Applicable Standard: ANSI/WDMA I.S.1-A, ANSI/BHMA A156.1, NFPA 80, UL 10C, AWI QCP
Inspection Purpose: Standard quality control for wooden doors exported to the United States, covering raw material, dimension, structure, finish, hardware, fire safety and packaging, to fully comply with US residential and commercial construction codes and market acceptance requirements
Inspection Type: Pre-production Inspection / In-process Inspection / Final Shipment Inspection / On-site Acceptance Inspection
Basic Inspection Information
Order No.: _______________ ｜ PO No.: _______________ ｜ Door Model: _______________
Door Type: Interior Wood Door / Exterior Wood Door / Fire-Rated Wood Door
Inspection Date: _______________ ｜ Inspector: _______________ ｜ Quantity Inspected: _______________
Acceptance Criteria: PASS / FAIL / PENDING (with deviation record)
1. Dimensional Tolerance Inspection (WDMA Standard)
All dimensional deviations shall comply with ANSI/WDMA I.S.1-A industry tolerance requirements, no over-tolerance deformation affecting installation and usage
- Door Slab Height: Tolerance range ±1.5mm; No uneven top/bottom edge, consistent with drawing specifications
- Door Slab Width: Tolerance range ±1.5mm; Left and right width consistent, no unilateral shrinkage or expansion
- Door Slab Thickness: Tolerance range ±1.0mm; Uniform thickness of the whole door, no local bulging or depression
- Diagonal Squareness: Diagonal deviation ≤2.0mm; Ensure door slab is square, no rhombus deformation
- Edge Straightness: Edge linearity deviation ≤1.0mm per meter; No warping, bending or irregular radian on door edges
- Door Frame Dimension: Frame height/width/thickness comply with US standard opening size; Assembly gap tolerance ≤2mm
- Clearance Gap: Top & side gap 2–3mm, bottom gap 6–8mm (interior door); Exterior door bottom gap weather-sealed compliant
2. Wood Material & Moisture Content Inspection
Comply with US local climate adaptation standards and AWI woodwork quality requirements, effectively prevent warping, cracking and mildew
- Wood Species Compliance: Face veneer, core wood and edge banding species strictly match contract and shop drawing requirements; No substitute materials without authorization
- Moisture Content (MC): Pre-glue and finished product MC controlled at 6%–8% (US standard); Uniform moisture of whole door, no local damp or overdrying
- Core Material Quality: Solid wood core / particle board / MDF core comply with specified grade; Full core filling, no hollow, collapse or loose internal structure
- Veneer Quality: Veneer thickness meets specification; Free of dead knots, live knots, cracks, sapwood streaks, mineral spots and discoloration defects
- Edge Banding Quality: Edge banding uses same wood species as face veneer; Tightly bonded, no warping, degumming, gap or rough edge
3. Structural & Joinery Quality Inspection
Ensure overall structural stability, meet US long-term usage durability standards, no loose or deformation after long-term opening and closing
- Joint Firmness: Mortise and tenon joints, splicing joints tightly fitted; Reinforced with environmental adhesive and mechanical fixing; No loose, gap or dislocation
- Internal Reinforcement: Hinge installation position with solid wood reinforcement block; Lock hole position reinforced, no hollow or weak structure
- Door Slab Flatness: Whole slab flatness deviation ≤1mm per meter; No bulging, sinking, wave deformation
- Frame Assembly Structure: Door frame jamb and head jamb firmly connected; Right angle verticality qualified, no frame distortion
- Warpage Resistance: Finished door no visible warpage; Static placement no bending deformation, comply with WDMA anti-warpage performance standard
4. Surface Finish & Coating Inspection
Meet US architectural woodwork appearance standards and environmental coating regulations, uniform and flawless surface, durable protection
- Color & Grain Consistency: Uniform surface color, no obvious color difference between door slab, frame and edge; Natural wood grain smooth and consistent, no grain distortion
- Coating Quality: Polyurethane/lacquer finish uniform and flat; No flow mark, bubble, pinhole, scratch, sand mark, dust particle defect
- Sheen Compliance: Matte / Semi-gloss / Gloss finish strictly matches customer specification; Uniform whole-door sheen, no local gloss difference
- Sanding Effect: Surface and edges finely sanded, smooth and burr-free; No rough hands-on feeling, no residual sanding trace
- Coating Adhesion: Paint film firmly attached, no peeling, chipping, cracking; Pass standard adhesion test, resistant to daily friction and collision
- Environmental Compliance: Coating materials meet US VOC emission standards; No peculiar pungent odor, compliant for indoor architectural use
5. Hardware Installation & Function Inspection (ANSI/BHMA A156.1)
All hardware and installation processes comply with US BHMA industry standards, flexible operation and stable performance
- Hardware Specification: Hinges, door locks, door closers, weatherstripping match specified brand, model and finish; No wrong model or mismatched color
- Hinge Installation: Hinge position accurate, vertical and horizontal level; Screws fully tightened, no sliding thread or loose; Door opening/closing smooth, no jitter or noise
- Lock Function: Lock body and lock cylinder installed in place; Flexible locking/unlocking, no jamming or failure; Key insertion and extraction smooth
- Door Operation: 0–90° opening/closing flexible and smooth; No abnormal friction, impact noise or sagging phenomenon
- Sealing Performance: Weatherstripping tightly fitted with door slab and frame; Complete sealing, no missing or degumming; Exterior door meets wind and rain resistance requirements
6. Fire Safety Inspection (NFPA 80 / UL 10C for Fire-Rated Doors)
Only applicable for US fire-rated wooden doors, fully compliant with US building fire protection codes
- Fire Rating Compliance: 20min/45min/60min/90min fire rating matches project requirements; Valid UL fire certification mark attached
- Fire-resistant Material: Internal fire-resistant core, fire-proof glue and fire-retardant veneer meet UL 10C test standards; No unqualified fire-resistant materials used
- Fire-resistant Structure: Door gap fire-resistant strip complete and intact; Frame fire-resistant filling standard, no missing fire-proof components
- Label Marking: Permanent fire-rated label pasted on door edge, clear and complete information, consistent with certification parameters
7. Defect Classification Standard
Unified judgment standard for US market acceptance, classify defective products scientifically
- Critical Defect (Reject Directly): Unqualified fire rating, wrong material species, excessive dimensional deviation affecting installation, structural looseness, paint peeling in large area, non-compliant safety performance
- Major Defect (Conditional Re-inspection/Repair): Obvious color difference, local slight scratch, individual loose screw, minor edge gap deviation
- Minor Defect (Acceptable after Simple Repair): Tiny dust spots, slight uneven local sheen, no impact on appearance and usage function
8. Packaging & Shipping Inspection (US Port Entry Standard)
- Surface Protection: Whole door covered with protective film, edge and corner wrapped with anti-collision foam; No exposure, effectively prevent transportation scratch and collision damage
- Packaging Firmness: Carton/wooden frame packaging firm, no loose package; Internal fixed firmly, no shaking and friction during transportation
- Marking Information: Clear outer box marking (PO No., model, quantity, size, destination, gross weight); Consistent with shipping documents, compliant with US customs clearance requirements
- Fumigation Compliance: Solid wood packaging with valid fumigation mark, meet US agricultural quarantine entry standards
9. Final Inspection Result & Signature
Overall Inspection Result: □ PASS (Qualified) □ FAIL (Unqualified) □ PENDING (To be confirmed)
Defect Description & Rectification Suggestion: ____________________________________________________________________
____________________________________________________________________
Inspector Signature: _______________ ｜ Date: _______________
Supervisor Review Signature: _______________ ｜ Date: _______________
Remarks: This inspection checklist is fully compliant with US wooden door industry mandatory standards and market access requirements, serving as the final acceptance basis for factory delivery and customer receipt
