Wood-lattice cellular board — dry-input UF electric-press manufacture

1. Scope and Applicability

This method covers factory manufacture of uncoated interior cellular wood panels whose skins are bonded to a frame and deliberately spaced coniferous wood laths, either parallel or in a lattice. The support core has designed cavities; continuous edge-glued solid strip cores are outside scope. Purchased kiln-dried coniferous lumber is cut into the core; purchased unbonded non-tropical hardwood veneer sheets not exceeding 6 mm form the skins. Powder UF adhesive is mixed with separately recorded water, and supplier-qualified solid ammonium chloride and wheat-flour extender when used. Press heating is electric. Separate rock-wool cavity infill is conditional on actual construction, not prescribed. Sources: un-cpc-cellular-3, usda-wood-handbook-2021.

Exclude solid blockboard/battenboard, all-veneer plywood, paper-honeycomb door cores, aluminium honeycomb, bamboo cores, foamed plastic cores, assembled doors/hardware, coated/preserved panels, purchased bonded skins, liquid premixed UF, other adhesive chemistries, raw-log conversion, on-site green-wood drying and fuel/steam/purchased-heat press routes. These require new physical inventory and applicability review. This recipe is an evidence-informed collection route; it is not an industry-average recipe, emission factor or claim of structural/fire/acoustic equivalence.

UN CPC 3.0 31610 identifies spaced wood laths, whereas the broader 31411 explanatory inclusion also mentions cellular board, and the 31421 title/note distinction does not settle every physical core. Resolve using the actual cross-section and bill of materials; retain classification overlap for maintainer mapping review. No method or accepted coverage of 3141/3142 is inferred from that wording. This route is limited to the narrower 31610 subset; the canonical mapping and its ADR govern accepted coverage. Sources: un-cpc-cellular-3, un-cpc-plywood-3, un-cpc-laminated-3.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.other-transportable-goods-except-metal-products-machinery-and-equipment.products-of-wood-cork-straw-and-plaiting-materials.cellular-board
classification_refs	CPC 3.0 31610; narrower; scope and accepted decisions: classifications/mappings/cpc-3.0-to-pcr.yaml and its referenced ADRs
covered_products	Uncoated interior spaced-lath/lattice wood-core panels of the declared UF electric-press route
excluded_products	Solid strip cores, all-veneer boards, paper/aluminium honeycomb and all exclusions in section 1
representative_product	Trimmed panel with coniferous spaced wood core and non-tropical hardwood veneer skins
production_route	Purchased dry inputs; core cutting/assembly; powder-UF mixing; skin bonding; electric pressing; conditioning; trimming and packing
market_state	Accepted uncoated interior panel at factory gate; no fittings; packaging separate

3. Reference Flow

Field	Value
What	Supply a cellular wood panel of declared physical construction
How much	1 kg accepted net finished panel at measured final moisture
How well	Declared thickness, skin/core species, lath spacing and orientation, bond acceptance and intended interior use; no assumed strength/fire/acoustic grade
How long or cycle	One factory production/acceptance cycle; no service-life assumption
reference_flow_link	finished_panel

Field	Value
Reference amount	1
Reference product flow	Cellular board 4b4e8668-1076-4cb6-ac5c-2334d535b1fb
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	Spaced parallel/lattice wooden core and frame geometry; wood species and grades per component; face/back thickness and grain axes; measured panel area/thickness/net mass/final moisture; cavity fraction and infill identity/mass; powder UF formulation, separate additives/water and solids; glue-contact area and actual spread; cure temperature/pressure/time and acceptance; uncoated interior state; site/period; input supplier/delivery gates; electricity voltage; packaging excluded; waste/air compartments and treatment destinations

Declare every qualifier in the dataset metadata or equivalent package field. A kilogram of production is not an equal area, load capacity or service between different panel designs. Do not replace the finished-product reference with an unpressed lay-up, blockboard or complete door.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	B = total accepted net finished panel mass of the same design, site, lots and period; weigh on calibrated scales excluding packaging using cp_output. Inventory denominator is B, not input mass or dry wood mass.
panel_geometry	reference product	Mass; area; length	kg; m2; m	Measure each accepted panel area A and final thickness t with calibrated length/thickness tools; rho_app = B / sum(A*t). Area per 1 kg = sum(A)/B. Apparent envelope volume includes cavities and is never solid wood volume. Separate actual solid face, frame and lath volumes, avoid overlapping lattice joints, and measure infill independently.
wood_moisture	core_stock; face_veneer; residue ledger	Mass	kg	u = (m_wet - m_od) / m_od; m_od = m_wet / (1 + u). Determine representative material moisture by sealed samples and oven-dry weighing or a calibrated instrument checked against it, cp_wood. Do not confuse dry-basis u with wet-basis water fraction. Keep panel net mass B at actual moisture. Source: usda-wood-handbook-2021.
glue_component_basis	uf_powder; nh4cl; wheat_extender; mix_clean_water	Mass	kg	Record as-supplied mass, measured solids and separately added water per recipe batch; glue-contact spread uses actual wood/skin contact area, not total cavity envelope. Dry resin solids are a composition ledger, not a second exchange. No fixed recipe or supplier solids default. Source: usda-wood-handbook-2021.
electric_energy	electricity	Net calorific value	MJ	E_MJ = 3.6 * E_kWh; use matched customer-side electricity meters, cp_energy. The database energy label does not make electricity combustible fuel. MJ steam/heat alone never establishes useful delivered heat; a heat route needs supplier boundary and measured enthalpy balance before adoption.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Received kiln-dried coniferous sawn timber, unbonded non-tropical hardwood veneers and separately supplied listed recipe/packaging inputs
starting_condition_role	Purchased-input gate for foreground conversion
product_classification_scope	Physically spaced wood-core subset of cellular board; 31610 context with 3141/3142 overlap retained
recursive_input_rule	Purchased already bonded cellular panels are outside this production route; internal rework stays in the same ledger and never creates another completed reference output
upstream_dataset_requirement	Link verified input suppliers covering forestry, sawnwood/veneer manufacture and drying, chemical and packaging production, electricity and matched delivery gates. Foreground alone is not cradle-to-gate; missing links remain explicit
disclosure	Actual component species/state, treatment, suppliers/geography/year, meters, infill, utility route, delivery inclusion, loss and waste destinations

rule_id	applies_to	rule	source_ids
b_foreground	cellular_manufacture	Include receipt/conditioning, core ripping and frame/lattice assembly, powder UF mixing and spread, skin lay-up, electric pressing/cure, cooling, final conditioning, trimming, acceptance, packing and controls. Keep phase throughput and energy/waste measurements within one foreground unit.	usda-wood-handbook-2021
b_route	cellular_manufacture	Exclude on-site combustion from this declared route. If actual fuel use, kiln drying, steam or purchased heat is present, expand the physical inventory and evidence before use; never hide it in electricity. Any biogenic CO2 actually emitted in an expanded route stays in LCI independently of an impact-reporting convention.
b_delivery	inbound_freight	Include actual inbound delivery either once in the matched supplier dataset or once as the specific freight exchange. Record delivery/treatment provider endpoints; missing supplier coverage is not a cutoff. Waste treatment burdens remain linked to actual destination.
b_identity	finished_panel	Physical core construction governs scope. Record photographs/cross-sections and separate skin/core/glue/infill bills. Classification words cannot substitute for a physical spaced wood support structure or accepted mapping.	un-cpc-cellular-3; un-cpc-plywood-3; un-cpc-laminated-3

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
cellular_manufacture	Dry-input wood-lattice cellular panel manufacture	required	Declared recipe/utility route	Foreground receipt through packaged gate, with net panel reference	1 kg accepted net panel

The physical sequence is receipt → cutting/frame and spaced-core assembly → skin/glue lay-up → press/cure → cooling/conditioning → trim/acceptance → packaging. Phase transfers are internal to this unit; preserve matched quantities on both sides of every handoff. Packaging follows acceptance without a second output with the same reference UUID. Track rework and glue/scrap/dust capture explicitly before burden attribution.

Process: Cellular panel manufacture (cellular_manufacture)

Inputs

Product flows

Kiln-dried sawn coniferous timber, at mill (core_stock)

Purchased kiln-dried coniferous sawn timber for frame and spaced parallel laths or a lattice. Record species, grade, moisture and actual solid member dimensions; do not count air spaces as timber.

• Selected flow: Kiln-dried sawn coniferous timber, at mill 50904047-e5b0-4110-990a-53751d250267
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_wood

Veneer sheets and sheets for plywood and other wood sawn lengthwise, sliced or peeled, of a thickness not exceeding 6 mm, of other non-coniferous wood (face_veneer)

Only unbonded non-tropical non-coniferous veneer sheets not exceeding 6 mm for the two skins; keep face and back quantities separately in raw records and sum this one material exchange. Previously bonded plywood skins require a new applicability and identity assessment.

• Selected flow: Veneer sheets and sheets for plywood and other wood sawn lengthwise, sliced or peeled, of a thickness not exceeding 6 mm, of other non-coniferous wood 7a8c3cba-0c6b-422a-ac79-b7032d874bcb
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_wood

Dry powdered urea-formaldehyde adhesive resin (uf_powder)

Record the purchased dry powder formulation and moisture/solids. Do not substitute an unspecified liquid UF resin record or create separate fictitious resin and carrier exchanges from a purchased premixed liquid glue.

• Selected flow: Dry powdered urea-formaldehyde adhesive resin
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_recipe

Ammonium Chloride (nh4cl)

Only separately supplied solid ammonium chloride used when the supplier-qualified powder recipe requires it. Weigh the salt; other hardeners require separate rows.

• Selected flow: Ammonium Chloride 0d0e3c27-1f93-4dc1-80d0-392a3226cd4f
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_recipe

Wheat flour (wheat_extender)

Only separately added wheat flour when used in the qualified recipe. Record as-received moisture and mass; not wood flour, starch or an inferred universal addition.

• Selected flow: Wheat flour f87532de-91ec-4971-8cde-7cb05b236b0f
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_recipe

Process Water (mix_clean_water)

Purchased treated process water for mixing and cleaning. Submeter the two uses and reconcile stock; water already included in supplied materials is not a second purchased-water exchange.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_water

Alternating current (electricity)

Grid-average customer-side AC below 1 kV, including cutting, electric press heating, mixing, trimming, handling, ventilation and controls. Preserve stage submeters; no fuel, steam or purchased heat is hidden in this row.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66; unit group 93a60a57-a3c8-11da-a746-0800200c9a66 / MJ
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_energy

rock wool (rock_wool)

Conditional separately supplied rock-wool cavity infill supported by the actual design and measured loading. Wooden laths remain the spaced support system. No paper, aluminium honeycomb or automatic acoustic/fire rating; no prescribed fill fraction.

• Selected flow: rock wool 4f1a182c-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_filler

Polyethylene film (pe_wrap)

Only polyethylene protective packaging film if used; weigh net issue minus returned stock. Packaging is outside accepted panel mass.

• Selected flow: Polyethylene film e64eb06c-6dc9-45f1-b003-3dc6c44b27e2
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_pack

Corrugated cardboard (corrugated_pack)

Only corrugated cardboard protective pads if used; this identity requires actual C-, E- or F-flute multilayer board with at least 80% fibre content, containing recycled material and recyclable. Verify grade, composition and delivered mass against the supplier specification; these identity limits are not default recipe fractions or assumed recycling credits. An incompatible grade requires a separately verified specific flow. This packaging material never establishes a paper-honeycomb core.

• Selected flow: Corrugated cardboard 8bde297e-98df-463f-bcb4-0db52bf6e0b5
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_pack

Non-refrigerated diesel rigid-truck inbound freight service (inbound_freight)

Conditional only for documented matching road delivery omitted by delivered-input providers. Use actual cargo mass and loaded distance, vehicle/emission class, load factor and empty-return convention. Other vehicle classes/modes require separate rows.

• Selected flow: Non-refrigerated diesel rigid-truck inbound freight service
• Flow property / unit: Mass-distance / t*km
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_transport

Outputs

Product flows

Cellular board (finished_panel)

One accepted trimmed, uncoated interior cellular wood panel output after cure and conditioning, excluding all packaging. Use the actual final net mass and skin/core geometry, not a lay-up or a finished door with hardware.

• Selected flow: Cellular board 4b4e8668-1076-4cb6-ac5c-2334d535b1fb
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: 1 kg
• Value mode: fixed_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_output

Sold clean coniferous sawdust (sold_sawdust)

Conditional only for segregated clean pre-gluing sawdust demonstrably sold as a coproduct. Keep physical mass and revenue records; it is mutually exclusive with the same lot in waste_sawdust. Resin-contaminated sanding dust is excluded.

• Selected flow: Sold clean coniferous sawdust
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_residue

Waste flows

Untreated coniferous wood offcuts (clean_offcuts)

Segregated solid wood offcuts before gluing, sent to documented waste treatment; keep moisture and destination. Internal reuse is an internal loop and is not counted twice as disposal.

• Selected flow: Untreated coniferous wood offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_residue

sawdust waste (waste_sawdust)

Only clean untreated sawdust from pre-gluing cutting or separately collected cutting dust, with actual receiver evidence matching the selected e1a44d20 untreated combustion/recovery route. Record whole physical mass, composition/moisture, stocks, transport and the receiving operation; the UUID does not authorize arbitrary disposal. Other actual disposal modes or treated/glue-contaminated states remain separately measured physical streams pending compatible identity/provider review, not omitted or zero. Captured particles are waste, not atmospheric PM; do not overlap sold_sawdust or internal return.

• Selected flow: sawdust waste e1a44d20-d968-4d64-bd7c-253a1441ab35
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_residue

UF-bonded cellular wood panel offcuts (bonded_offcuts)

Cured panel trims and rejected panel pieces, including their bonded wood and cured glue. Separate rock-wool-containing reject pieces into an additional composition-specific flow when present; do not call resin-contaminated wood clean biomass fuel.

• Selected flow: UF-bonded cellular wood panel offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_residue

Uncured urea-formaldehyde mixed adhesive waste (uncured_glue)

Separately weighed expired mixed adhesive and squeeze-out not incorporated into cured rejects. Record recipe, water, cure state and actual treatment; adhesive-coated label residue is not this flow.

• Selected flow: Uncured urea-formaldehyde mixed adhesive waste
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_residue

UF adhesive preparation and equipment-cleaning wastewater (wastewater)

A single combined wastewater stream from UF adhesive preparation and equipment cleaning, sent to external treatment and measured at handoff with composition, suspended solids, COD and formaldehyde where present. No simultaneous direct environmental discharge of its pollutant mass; direct-discharge sites require expanded specific elementary rows.

• Selected flow: UF adhesive preparation and equipment-cleaning wastewater
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_water

Elementary flows

particles (PM2.5) (pm25)

Outdoor-air release, subcompartment unspecified, fine fraction at or below 2.5 micrometres only. Measure residual stack plus fugitive emissions after controls; source uncertainty cannot turn total dust into PM2.5.

• Selected flow: particles (PM2.5) 08a91e70-3ddc-11dd-9293-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air

particles (PM2.5 - PM10) (pm25_10)

Outdoor-air release, subcompartment unspecified, fraction greater than 2.5 and at or below 10 micrometres only. When tests report nested PM10 and PM2.5, subtract matching samples rather than summing the nested totals.

• Selected flow: particles (PM2.5 - PM10) 08a91e70-3ddc-11dd-9501-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air

particles (> PM10) (pm_over10)

Outdoor-air release, subcompartment unspecified, particles greater than 10 micrometres only. Derive from size-resolved measurement or matched total-PM minus PM10; keep confidence and sampling conventions.

• Selected flow: particles (> PM10) fe0acd60-3ddc-11dd-a70a-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air

formaldehyde (formaldehyde)

Formaldehyde species only, released to outdoor air with unspecified subcompartment during mixing, pressing/cure and conditioning. Use site speciation and operating time; indoor exposure or later service chamber concentration is not a factory emitted mass.

• Selected flow: formaldehyde 08a91e70-3ddc-11dd-941b-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air

methanol (methanol)

Conditional methanol species only when site recipe/emission testing shows it is emitted to outdoor air, unspecified subcompartment. Do not use total VOC as methanol or copy a plywood survey emission factor.

• Selected flow: methanol fe0acd60-3ddc-11dd-a935-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air

water vapour (water_vapour)

Water vapour released to outdoor air, unspecified subcompartment, from conditioning and aqueous-glue cure. Quantify from matched moisture/recipe water balance and discharge records, with reaction-water assumptions disclosed. It is not purchased steam or a heat-energy flow.

• Selected flow: water vapour fe0acd60-3ddc-11dd-ac04-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66; unit group 93a60a57-a4c8-11da-a746-0800200c9a66 / kg
• Amount rule: Physical total of this exchange for the same design, lots, site and period divided by B, the accepted net panel kg from cp_output. Retain unallocated totals and destinations; missing is not zero; verify actual absence before marking a conditional flow inapplicable.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_water

7. Allocation and Co-product Handling

rule_id	applies_to	rule
a_physical	all inventory rows	Maintain an unallocated process graph, dry wood/water/carbon ledger and physical external amounts first. Internal rework/captured dust never becomes a second final output. Never multiply physical product or coproduct mass by an allocation share.
a_subdivide	cellular_manufacture	Separate measurable product-specific phases and design cohorts before allocating joint environmental burdens. Shared meter attribution between lines requires observed phase energy/operating evidence, never a fabricated recipe average.
a_coproduct	sold_sawdust; waste_sawdust	Treat clean sawdust as a coproduct only with actual sale/function evidence, otherwise as waste. Preserve physical mass and equal lot identities. If unavoidable joint burdens cannot be related by a documented physical relation, use disclosed same-period net sales revenue shares for panels and that coproduct; retain a physical-basis sensitivity, prices, currency and zero/negative-price handling.
a_no_credit	waste outputs	Waste-treatment burden links follow the actual destination. Do not combine allocation with automatic avoided-fuel/recycling credits. A substitution scenario needs separately documented receiving function, quality, displacement and boundaries.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_output	cellular_manufacture	finished_panel	foreground_record	lot_id; design; accepted/reject count; tare; net mass; final moisture; A; t; cross-section; core spacing; skin axes; bond acceptance	Calibrated net panel weighing excluding packaging; calibrated area/thickness measurements and representative oven-dry moisture samples; archive design/BOM and acceptance records	kg; m2; m	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_wood	cellular_manufacture	core_stock; face_veneer	foreground_record	supplier; species; grade; received/issued/returned mass; moisture; solid dimensions; opening/closing stock; phase handoffs	Weigh and reconcile material stock by species and lot; sealed representative moisture samples, oven-dry check; dimensional survey excludes cavities and lattice joint overlap	kg; m	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_recipe	cellular_manufacture	uf_powder; nh4cl; wheat_extender	foreground_record	supplier powder recipe; each separate ingredient mass; solids/moisture; water; pot-life timestamps; contact area; spread; cure schedule; unused mixed glue	Calibrated ingredient scales and mixing batch records; supplier certificate plus tested solids; actual lath/skin glue-contact survey and press logs; record actual recipe rather than handbook defaults	kg; m2	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_filler	cellular_manufacture	rock_wool	foreground_record	design; infill product; density; delivered/issued/returned mass; cavity placement; reject composition	Weigh rock-wool loading separately and inspect the wooden support path; determine whether infill changes declared product function; retain supplier/acceptance evidence	kg	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_energy	cellular_manufacture	electricity	foreground_record	voltage; supplier/time mix; phase meters; press heaters; cutting; controls; idle/shared consumption; accepted mass	Calibrated customer-side meters; submeter phases and reconcile main meter, idle operation and shared users; electricity heating cannot be replaced by steam or fuel energy	kWh; MJ	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_water	cellular_manufacture	mix_clean_water; wastewater; water_vapour	foreground_record	mix/clean water; material moisture; recipe water; discharge mass/composition; retained water; phase evaporative loss; reaction-water assumptions	Matched water meters/scales and stock reconciliation; sample outgoing wastewater composition; reconcile measured incoming/retained/discharged water before estimating vapour with stated uncertainty	kg	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_pack	cellular_manufacture	pe_wrap; corrugated_pack	foreground_record	material identity; film/pad grade; issued/returned stock; actual net consumption; reused protection	Weigh film and corrugated pads separately; reconcile stock and reuse cycles; keep packaging outside B; record any additional real packing component as its own exchange	kg	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_transport	cellular_manufacture	inbound_freight	foreground_record	cargo mass; loaded km; origin/destination; truck class; fuel/emission class; load; empty return; provider delivery coverage	Actual trip records and weighbridge logs; sum each matched cargo mass in tonnes times loaded distance; disclose background empty-return/load convention and prevent duplicate delivery	t*km	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_residue	cellular_manufacture	sold_sawdust; clean_offcuts; waste_sawdust; bonded_offcuts; uncured_glue	foreground_record	phase; lot; moisture; glue contamination; mass; internal return; destination; treatment; sale invoice/price; opening/closing stock	Segregated calibrated waste/coproduct weighing and manifest/invoice records; reconcile each lot disposition and rework; separate clean wood, cured panel and uncured adhesive; never infer fuel eligibility from colour	kg	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope
cp_air	cellular_manufacture	pm25; pm25_10; pm_over10; formaldehyde; methanol	foreground_record	phase/source; species; aerodynamic size fraction; sample dry/wet conditions; concentrations; exhaust flow; hours; capture/control efficiency; fugitive release; detection limits	Representative site stack/fugitive sampling under recorded production and ventilation; integrate matched mass rate/time, preserve raw nested PM results and derive only disjoint fractions; speciate gases, quantify censored results/uncertainty	kg	Each lot and representative phase testing	Same declared production period including startup/idle/rejects and actual variation	Same design and factory boundary	per 1 kg reference flow	Calibration/test reports; supplier and lot evidence; controls and missing scope

For every protocol, the aggregation basis means the recorded physical total divided by the same cohort accepted net panel mass B. Retain unallocated raw totals, lot mass/area/thickness and destinations; the denominator is neither panel count nor cavity volume.

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
batch_reference	all inventory rows	x_norm = sum(x_physical) / B; retain raw exchange totals for the matched accepted panel cohort; never apply burden shares to these physical totals. The finished reference output is 1 kg.	x_physical; B; cp_output	x_norm
geometry_conversion	finished_panel	A_norm = sum(A) / B; V_envelope_norm = sum(A*t) / B. Solid wood volume is the measured sum of actual skins, frame and laths minus overlapping joints. V_void is the remaining designed cavity envelope; record actual infill separately. No solid-wood-density multiplication of V_envelope or V_void.	A; t; B; component dimensions; cp_output; cp_wood; cp_filler	measured mass-area-thickness relation
material_water_carbon	cellular_manufacture	Balance dry wood, water and carbon separately before allocation: inputs plus opening stock = product plus externally routed residues/emissions plus closing stock, within measured uncertainty. Include measured adhesive solids/water and fossil organic carbon separately from wood carbon; use measured or cited species carbon fractions, not a universal default. Explain unresolved residuals, reaction water and missing volatile species; never assign residual mass automatically to water vapour.	cp_output; cp_wood; cp_recipe; cp_residue; cp_water; cp_air	unallocated physical balances	usda-wood-handbook-2021
disjoint_particles	pm25; pm25_10; pm_over10	For matched tests, PM_2.5_10 = PM10 - PM2.5 and PM_over10 = total_PM - PM10, only when sampling boundaries are compatible. Physical particulate mass is the sum of the three disjoint fractions. Do not add nested total_PM or PM10 again; negative differences require review rather than clamping to zero.	matched total_PM; PM10; PM2.5; cp_air	disjoint particulate exchanges
burden_attribution	cellular_manufacture	Keep a separate burden ledger. For documented economic allocation of unavoidable joint burdens only, f_j = revenue_j / sum(revenue_j); assigned burden_j = f_j * joint burden plus product-specific burden. Keep all physical outputs unchanged; disclose sensitivity and actual sales basis.	joint burden; product-specific burden; sales; cp_residue	separate attributed burden ledger
complete_period_normalization	all inventory rows	Every existing campaign, batch or lot amount rule and linked collection protocol uses one documented complete reporting-period pool for the same declared product, grade, route, configuration, site and reference state. Accepted-lot wording identifies the denominator only; retain all attributable startup, shutdown, wholly failed or zero-output batches, rejects, work in progress and rework in the raw native-unit numerator records. Count reworked reference product once only when finally accepted. Sum each attributable exchange over this matched pool, divide once by its strictly positive accepted reference-product quantity in the declared denominator unit, and scale to the declared reference quantity. Do not average batch ratios, drop a failed batch, pool unrelated products/periods or replace native numerator units. If the entire matched pool has no accepted output, retain the unnormalized absolute inventory and require review; issue no normalized result or fabricated output. Preserve stock/return and physical-transfer ledgers independently of burden allocation; allocation never removes already-incurred failed/rework activity.	all linked raw collection protocols; accepted reference-product pool; stock and rework links	native exchange unit per declared reference quantity; zero-output pool remains unnormalized

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_boundary	all inventory rows	Retain actual cross-section/BOM, delivery endpoints, identity/property/unit matches, species, treated state, supplier/time and complete measurement scope. UUID identity alone does not establish a usable provider.	Actual raw records and scope/uncertainty disclosure
dq_primary	all inventory rows	Collect site data under the declared protocols before dataset completion. No synthetic values, literature-to-industry extrapolation or default recipe. Record missing/under-detection observations and whether each conditional row is absent or unresolved.	Actual raw records and scope/uncertainty disclosure
dq_units	all inventory rows	B, lot cohort and moisture/area/thickness basis must match. Keep calibration, repeat measurements, uncertainties, disjoint PM size definitions, concentration and wet/dry corrections. Supply actual provider conversions; secondary database property coefficients are not measured density.	Actual raw records and scope/uncertainty disclosure
dq_completeness	cellular_manufacture	List omitted operations, unmatched suppliers, additional real ingredients/consumables/packaging/wastes/species and their material significance. Add atomic exchanges before use when these occur. No all-tools-failed or unsupported measurement result can certify completeness.	Actual raw records and scope/uncertainty disclosure

9. Validation Rules

rule_id	applies_to	rule
v_construction	finished_panel	Require spaced wooden parallel/lattice support and separate skins, glue and optional infill. Reject solid blockboard, paper/aluminium honeycomb and complete doors even when a label says cellular board.
v_reference	all inventory rows	Exactly one completed reference product output equals 1 kg net panel; all amounts and protocol aggregation are per the same 1 kg reference flow. Missing UUIDs stay unresolved, not replaced with near products or hidden identities.
v_balances	cellular_manufacture	Audit unallocated physical transfers and separate dry-wood, water and carbon balances before inspecting burden allocation. Cavities never become solid wood volume. Internal link quantities must agree; rejects, stock and rework cannot vanish.
v_air	pm25; pm25_10; pm_over10; formaldehyde; methanol; water_vapour	Verify exact substance/size/medium and post-control release basis. No correction flows, total VOC proxy, nested-PM double count or indoor-to-outdoor substitution. Keep biogenic and fossil origins separate whenever actual carbon exchanges are added.
v_readiness	all inventory rows	A dataset is incomplete when actual flow/provider identity, quantities, useful-heat basis, source scope or measurement relationships are unresolved. State performed/skipped checks and uncertainty. Classification acceptance and scientific review are separate decisions.

10. Published Dataset Profile

Field	Value
dataset_role	Site-specific foreground cellular wood-panel conversion with verified upstream links
downstream_use	secondary_dataset; background_dataset only with declared route/provider completeness
allowed_use	Matched interior panel manufacturing studies after applicability and dataset-completeness review
excluded_use	Universal 31610/3141/3142 coverage, solid blockboard, paper/aluminium honeycomb, lifetime/equivalent-service claims, unverified provider substitution
required_metadata	Spaced parallel/lattice wooden core and frame geometry; wood species and grades per component; face/back thickness and grain axes; measured panel area/thickness/net mass/final moisture; cavity fraction and infill identity/mass; powder UF formulation, separate additives/water and solids; glue-contact area and actual spread; cure temperature/pressure/time and acceptance; uncoated interior state; site/period; input supplier/delivery gates; electricity voltage; packaging excluded; waste/air compartments and treatment destinations
required_quality_disclosure	Primary period, represented production, measured mass/area/thickness, moisture, balances, unresolved identities/providers, omissions, allocation and uncertainty
update_trigger	Changed core/skin/infill design, adhesive recipe/route, utilities, species, delivery/treatment, controls, supplier boundaries or material new evidence

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-cellular-3	official_guidance	UNSD, CPC Version 3.0, 31610 explanatory note, https://unstats.un.org/unsd/classifications/Econ/Structure/Detail/EN/2100/31610	Spaced parallel/lattice wood core and downstream panel uses; classification only, no quantities
un-cpc-plywood-3	official_guidance	UNSD, CPC Version 3.0, 31411 explanatory note, https://unstats.un.org/unsd/classifications/Econ/Structure/Detail/EN/2100/31411	Broader plywood explanatory inclusion mentioning cellular board; unresolved mapping overlap, no automatic coverage
un-cpc-laminated-3	official_guidance	UNSD, CPC Version 3.0, 31421 explanatory note, https://unstats.un.org/unsd/classifications/Econ/Structure/Detail/EN/2100/31421	Title/note physical-classification caution for laminated/veneered wood; no inferred core identity
usda-wood-handbook-2021	handbook	USDA Forest Products Laboratory, Wood handbook—wood as an engineering material, 2021, FPL-GTR-282, https://www.govinfo.gov/content/pkg/GOVPUB-A13-PURL-gpo158673/pdf/GOVPUB-A13-PURL-gpo158673.pdf ; pp. 4–1, 10–11 Table 10–1, 10–12 to 10–13, 11–4 and G–8	Dry-basis moisture; powder/liquid UF forms and separate mixing constituents; bonding/clamping/cure/conditioning and interior UF limitations; hollow-core glossary includes broader paper constructions, of which only the spaced wooden construction is adopted. No handbook recipe percentages, thresholds or survey factors are defaults.