Overview
ISO 16507:2013 - Timber structures: Test methods for uniform, concentrated static and concentrated impact loads on wood‑based roof and floor panel assemblies - defines laboratory procedures to determine the resistance of wood‑based panels (sheathing, subfloors, single floors) to deflection and damage under realistic service loads. The standard focuses on deflection and damage from non‑rigid blunt impact, concentrated static loads, and uniformly distributed loads for panels installed directly to framing. It does not evaluate surface indentation separately, vibration effects, or the framed assembly as a whole.
Key topics and technical requirements
- Test types
- Concentrated static load test
- Concentrated impact load test
- Uniformly distributed load test
- Specimen conditioning
- Dry: Conditioning to constant weight or for at least 2 weeks at (20 ± 2) °C and (65 ± 5) % RH
- Wet: Continuous water spray to top surface for 3 days (no ponding or immersion)
- Redried: Wet conditioning followed by dry conditioning
- Applications covered
- Roof sheathing (tested dry and wet)
- Subfloors (tested dry and redried)
- Single floors (tested dry and redried)
- Orientation and installation
- Panels tested parallel and/or perpendicular to panel strength axis
- Specimens installed on framing with the intended fastener schedule and details
- Apparatus and measurement
- Loading disks: 76 mm diameter (foot traffic / stiffness), 25 mm diameter (concentrated strength); edges rounded to ≤1.5 mm radius
- Deflection measurement: rigid tripod‑mounted gauge or equivalent with resolution ≤0.03 mm and ≤1 % error
- Load application through self‑aligning ball‑and‑socket joint; supports must prevent framing deflection
- Specimen size notes
- Minimum specimen widths and span considerations are specified (e.g., ≥595 mm for spans ≤610 mm)
- Reporting
- Test procedures include required reporting elements (load, deflection, conditioning state, orientation, failures)
Practical applications and users
ISO 16507:2013 is used by:
- Manufacturers of wood‑based roof and floor panels for product development and performance claims
- Independent testing laboratories performing durability and structural tests
- Structural and façade engineers assessing panel performance under concentrated loads and impacts
- Code officials, product certifiers, and specifiers who need comparable test data for span ratings and acceptance
- Builders and contractors interested in in‑service performance under construction traffic and fixture loads
Practical uses include evaluating stiffness and strength for span rating, verifying resistance to construction and in‑service impacts, and supporting design decisions for roof and floor sheathing selection.
Related standards
- ASTM E661 (basis for concentrated static/impact procedures)
- NIST Voluntary Product Standard PS 1 (basis for uniformly distributed load procedure)
- References to PS 1, PS 2 and CSA O325 span‑rating conventions are provided in Annex A for performance guidance.
Keywords: ISO 16507:2013, timber structures, wood‑based panels, roof sheathing, floor sheathing, concentrated impact loads, concentrated static loads, uniformly distributed loads, test methods, deflection, specimen conditioning.