Florida Building Code Practice Exam

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What is the shear value per foot of wall for 2-ply gypsum wallboard, 5/8" thick, over a wood-framed wall assembly?

175 plf
187 plf
200 plf
250 plf

The correct answer is: 250 plf

The shear value per foot of wall for 2-ply gypsum wallboard, 5/8" thick, over a wood-framed wall assembly is 250 pounds per linear foot (plf). This value reflects the structural capacity of the wall assembly to resist lateral loads, such as those from wind or seismic activity. Using two layers of 5/8" thick gypsum wallboard enhances the shear capacity compared to a single layer. This increase is due to the added stiffness and rigidity provided by the additional ply, as well as the bonding and composite action between the two layers. Over time, the building code recognizes this combination's effectiveness in maintaining structural integrity, especially in high-wind zones typical in Florida. Thus, the correct shear value for the specified assembly confirms its robustness in providing necessary resistance against lateral forces, aligning with the relevant Florida Building Code provisions regarding wall assemblies.