bridgebuster
Active member
I'm checking a contractor design for a temporary truss. I think this may be one of those LRFD gray areas.
In LRFD Table 3.8.1.2.1 -1 Base Wind Pressure; the windward load is 50 psf. However theres a note at the bottom of the table that says wind load cannot be less than 300 plf. The truss area is given as 3 sf/lf; the design doesn't meet the 300 plf.
The contractor ignored this and just uses Table 3.8.1.2.2-1 - Loads From Superstructure, to determine his transverse and longitudinal wind forces. None of the square foot loads in this table produce a force that exceeds 300plf.
Is my interpretation correct? The minimum requirement listed after Table 1 applies to Table 2? The commentary for table 2 seems to imply this.
In LRFD Table 3.8.1.2.1 -1 Base Wind Pressure; the windward load is 50 psf. However theres a note at the bottom of the table that says wind load cannot be less than 300 plf. The truss area is given as 3 sf/lf; the design doesn't meet the 300 plf.
The contractor ignored this and just uses Table 3.8.1.2.2-1 - Loads From Superstructure, to determine his transverse and longitudinal wind forces. None of the square foot loads in this table produce a force that exceeds 300plf.
Is my interpretation correct? The minimum requirement listed after Table 1 applies to Table 2? The commentary for table 2 seems to imply this.