# Performance Specification Gap in Division 06 Wood, Plastics, and Composites submittals

> Source: https://deviationcheck.com/divisions/06-wood-plastics-composites/performance-specification-gap/

A measurable performance property in the submittal (rating, capacity, tolerance, efficiency) does not meet what the spec requires.

## What to look for in Division 06 Wood, Plastics, and Composites

Key performance parameters in Division 06 submittals:
- **Wood species and grade** - Douglas Fir #1, SPF #2, Southern Pine #2, etc. per AWC NDS grade tables
- **Moisture content** - 19% max for S-DRY lumber, 15% max for KD (kiln-dried), MC requirements for enclosed conditions
- **Glulam combination symbol** - 24F-V4, 26F-V2, etc. per AITC/APA standards; species and appearance grade
- **Structural composite lumber grade** - LVL, PSL, or LSL design values (Fb, Fv, E, Fc) per manufacturer ESR
- **Fire-retardant treatment (FRT)** - type, flame spread index, smoke developed index per ASTM E84
- **Preservative treatment retention** - pcf (pounds per cubic foot) per AWPA standards for intended use category
- **Connector/hardware load ratings** - allowable loads per ICC-ES ESR at specified conditions (wood species, load duration)
- **Truss design loads** - per TPI 1 including dead, live, snow, wind, and duration-of-load factors
- **Deflection limits** - L/360 live load, L/240 total load, or tighter limits per spec
- **CLT panel layup and grade** - per ANSI/APA PRG 320, stress grade and number of laminations
- **Plywood/sheathing span rating** - APA span rating and exposure classification (Exposure 1, Exterior)

## Severity

Default grade: Blocker. Always a Blocker when the gap touches life-safety or structural performance.