Florida Building Code Practice Exam

The maximum roof support spacing for 1/2" thick C-D grade plywood without edge blocking is indeed 24". This thickness and grade of plywood is typically subject to specific spacing requirements due to its structural capabilities and load-bearing characteristics.

C-D grade plywood is often used in roof applications, and the Building Code sets limitations on how far apart the supports can be spaced to ensure safety and structural integrity. The spacing of 24 inches is designed to prevent excessive deflection and potential failures in the plywood under load. If the spacing were increased beyond this limit without edge blocking, it could lead to issues such as sagging or cracking of the plywood.

While the other provided spacings might seem plausible, they exceed the recommended maximum and do not comply with the code's requirements for safe construction practices regarding plywood applications. Following these specifications is essential to maintain the structural integrity of the building.