# Performance Specification Gap in Division 13 Special Construction submittals

> Source: https://deviationcheck.com/divisions/13-special-construction/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 13 Special Construction

Key performance parameters in Div 13 submittals:
- **Clean room ISO classification** (ISO 5 through ISO 8 per ISO 14644-1) - particle count at rest vs operational
- **Air changes per hour (ACH)** for clean rooms and controlled environments
- **Room pressurization** (Pa positive or negative relative to adjacent spaces)
- **Cold storage temperature range** and insulation R-value for envelope panels
- **Pool circulation rate** (gpm) and turnover time (hours)
- **Lightning protection zone of coverage** - rolling sphere radius per NFPA 780/UL 96A
- **Vault fire rating** (hours per ASTM E119 or UL 72)
- **Blast resistance** (psi overpressure and duration)
- **Sound isolation** - STC (Sound Transmission Class) and NIC (Noise Isolation Class) per ASTM E90/E413
- **Seismic isolation bearing capacity** (kips) and maximum displacement (inches)
- **Radiation shielding thickness** (mm lead equivalent or concrete density)
- **Storm shelter wind speed rating** (mph) and missile impact resistance per ICC 500
- **Flame propagation** of clean room wall/ceiling panels per ASTM C1166
- **Pre-engineered building design loads** - wind, snow, seismic per ASCE 7 and IBC

## Severity

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