The difference

From dead zones to code-compliant coverage

A failing benchmark test is the legal trigger for an ERCES. Toggle the building to see how a roof donor antenna, a bi-directional amplifier, and a coax riser carry public-safety signal to every floor, the outcome we engineer and then prove with an on-site grid test.

Get a grid test quoteHow ERCES works
General coverage at benchmark (FAIL)
33%
General coverage at benchmark (FAIL)
General coverage at acceptance (PASS)
98%
General coverage at acceptance (PASS)
Critical-area coverage at acceptance (PASS)
99%
Critical-area coverage at acceptance (PASS)
Sq ft brought into ERCES compliance
15M+
Sq ft brought into ERCES compliance

The grid test

From dead zones to code-compliant coverage

Every ERCES project starts and ends with the same test: the building is divided into measurement grids, each one passes or fails, and compliance is the share that passed.

BENCHMARK GRID TESTWhat the AHJ would have seen51%OF TEST GRIDS PASSINGFAIL100 GRIDS · EACH SQUARE IS 1% OF THE BUILDINGACCEPTANCE GRID TESTWhat the AHJ signed100%OF TEST GRIDS PASSINGPASS100 GRIDS · EACH SQUARE IS 1% OF THE BUILDINGIFC 510 and NFPA 1225 require 95% of grids passing in general areas, 99% in critical areasClawson Manor, 15 stories: 51% to 100% in four days

Grid passingGrid failingNot yet testedThe test walk

The difference

Before and after, floor by floor

Before the ERCES system is installed, the building fails at 33% general coverage. After installation, the acceptance grid test shows 98% general and 99% critical coverage, a pass.

General coverage at benchmark (FAIL)
33%
General coverage at benchmark (FAIL)
General coverage at acceptance (PASS)
98%
General coverage at acceptance (PASS)
Critical-area coverage at acceptance (PASS)
99%
Critical-area coverage at acceptance (PASS)
Sq ft brought into ERCES compliance
15M+
Sq ft brought into ERCES compliance

  • F7

    Before (dBm):
    −122
    Before coverage:
    4%
    After (dBm):
    −78
    After coverage:
    95%

  • F6

    Before (dBm):
    −118
    Before coverage:
    8%
    After (dBm):
    −74
    After coverage:
    96%

  • F5

    Before (dBm):
    −110
    Before coverage:
    16%
    After (dBm):
    −70
    After coverage:
    97%

  • F4

    Before (dBm):
    −104
    Before coverage:
    27%
    After (dBm):
    −67
    After coverage:
    99%

  • F3

    Before (dBm):
    −96
    Before coverage:
    41%
    After (dBm):
    −63
    After coverage:
    98%

  • F2

    Before (dBm):
    −88
    Before coverage:
    58%
    After (dBm):
    −60
    After coverage:
    99%

  • G

    Before (dBm):
    −72
    Before coverage:
    78%
    After (dBm):
    −58
    After coverage:
    99%

  • Whole building

    Before (dBm):
    Before coverage:
    33% (FAIL)
    After (dBm):
    After coverage:
    98% general, 99% critical (PASS)

Code minimum: at least 95% general and 99% critical coverage at or above −95 dBm, per IFC 510 and NFPA 1225. Illustrative, modeled on a real 7-floor project. This building: 81,706 sq ft.

Related services

Let's solve your wireless challenge

Tell us about your building and goals. A WZC engineer will get back to you within one business day.

Get a grid test quoteCall 248-946-4000