What are the Structural Loads for Nashua?

Snow Loads

At an elevation of 400 feet, Nashua’s ground snow load is 60 pounds per square foot (psf). Design snow loads on roofs are determined by multiplying the ground snow load by a series of modification factors specified in ASCE 7 and the building code.

Wind Load

 The ultimate design wind speed is 120 mph. Reference IBC 2015 Fig. 1609.3 (1)

Seismic Load

The maximum considered earthquake ground motion for Site Class B:
  • The 0.2 second spectral response. Reference IBC 2015, Fig.1613.1 (1)
  • The 1.0 second spectral response.  Reference IBC 2015, Fig. 1613.1 (2)

Frost Line

Frost penetration shall be considered to extend to a minimum of 48” below grade

Rainfall Intensity

 The 100 year, 1-hour rainfall is 2.5 inches Reference. IBC 2015, Figure 1611.1.