Local Design Load Criteria

The following load criteria are based on Chapter 16 of the Virginia Construction Code, the 2010 ASCE-7 and Chapter 3 of the 2012 Virginia Residential Code.

Type Criteria
Ground snow load 25 psf 1.25 kN/m2

Ultimate (Vult)

90 mph
115 mph

40 m/s
51 m/s

Frost depth
24 in.
600 mm
Earthquake spectral response acceleration at short periods: 0.129
at 1 second period: 0.053
Residential Seismic Design Category B
Weathering probability for concrete severe
Termite infestation probability moderate to heavy
Decay probability slight to moderate
Ice shield underlayment required yes
Flood hazards (date of entry into National Flood Insurance Program) 3/5/1990
Winter Design Temperature 17°F -9°C
Air freezing index ?1500°F ?815°C
Mean annual temperature 50°F 10°C

Contact Fairfax County: Phone, Email or Twitter | Main Address: 12000 Government Center Parkway, Fairfax, VA 22035
Technical Questions: Web Administrator

ADA Accessibility | Website Accessibility
Awards | FOIA | Mobile | Using this Site | Web Disclaimer & Privacy Policy | Get Adobe Reader
Official site of the County of Fairfax, Virginia, © Copyright 2015

Website Feedback Website Feedback    Globe with various flags representing Web site language translations   Language Translations

Return to Graphic Version