What is the standard grid size?

IFC 510 specifies 20-foot grids in critical areas and 40-foot grids in general areas, though local AHJs may have stricter requirements.

What percentage coverage is required to pass?

Most jurisdictions require 95% coverage in general areas and 99% in critical areas like stairwells and elevator lobbies.

Can we reuse old floor plans for grid testing?

We recommend using as-built drawings when available. We can also create grid plans from on-site measurements if needed.

Grid Testing

Systematic coverage verification using standardized grid methodology required by fire codes.

(888) 508-3001 ext. 2003

Overview

Grid testing is the standardized methodology for ERRCS coverage verification specified in IFC Section 510 and NFPA codes. We test at 20-foot intervals throughout critical areas and 40-foot intervals in general areas, ensuring comprehensive coverage documentation that meets AHJ requirements.

Typical Pricing Range

Most grid testing projects fall in the range of $3,000-$10,000+, depending on building size, access conditions, AHJ requirements, and whether remediation is needed.

Who Needs This Service

All buildings requiring ERRCS compliance
Properties undergoing initial testing or annual recertification
Buildings with additions or renovations
Facilities disputing previous test results

Our Process

1
Grid Planning
Create testing grid based on building floor plans and AHJ requirements
2
Area Classification
Identify critical areas (stairwells, elevator lobbies) requiring denser testing
3
Systematic Testing
Test each grid point for both inbound and outbound coverage
4
Data Collection
Record all measurements with GPS/location tagging
5
Analysis & Reporting
Generate compliance reports with coverage percentages