Code of Massachusetts Regulations
780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
Chapter 16 - Structural Design
Section 1608 - SNOW LOADS
Subsection 1608.5 - Very High Roof Separations
Universal Citation: 780 CMR MA Code of Regs 1608.5
Current through Register 1531, September 27, 2024
When the ratio hr/LT is greater than 1.0, where LT is the dimension in feet of the upper roof perpendicular to the wind flow (perpendicular to lu in Figure 7-8 of ASCE 7) and hr = hb + hc, the drift surcharge load on the lower roof due to drifting of snow from the upper roof may be reduced. The reduced height of the drift surcharge, hdr, shall be not less than: hdr = hr (2 - hr/LT), except that when hr/LT is greater than 2.0, hdr shall be equal to zero.
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