Active Building Codes Virginia Uniform Statewide Building Code / 2006 International Building Code / 2006 International Residential Code for One- & Two-Family Dwellings / 2006 ICC International Fuel Gas Code / 2006 ICC International Mechanical Code / 2006 ICC International Plumbing Code / 2006 ICC International Energy Conservation Code / 2006 National Electrical Code / 2005 Highland County Zoning Ordinance / 1998 «
Residential Construction Design Parameters
Subject To Damage From
Ground Wind Seismic Weathering Frost Termite Decay Weather Ice Flood Air Mean
30 psf 90 B Severe 30" Moderate Slight to 0° - 10° No FIRM-1984 750 47.6° F
Commercial Construction Design Parameters
Spectral Response Acceleration
Ground Snow Load Wind Speed Ss %g S1 %g Weathering Frost Line
30 psf 90 22% 9.2% Severe 30"
IRC Energy Efficiency
*VA is Zone 4 Moist
Walls (R-value) R-13
Floors (R-value) R-19
Ceiling (R-value) R-38
Basement Walls (R-value) R-10 cont ext or R-13 in stud wall
Crawl Space Walls (R-value) R-10 cont ext or R-13 in stud wall
Slab (R-value) R-10, 2ft.
Mass Wall (R-value) R-5
Ducts (outside the thermal envelope) R-8
Windows (U-factor) 0.40
Skylights (U-factor) 0.60
Doors (U-factor) 0.40
Highland County hilandbz@htcnet.org 
