Where should bracing be installed when installing trusses?

Bracing should be installed near the top of the trusses and on top of the bottom chords to ensure proper structural integrity and performance of the truss system. When bracing is positioned at these locations, it helps to maintain the alignment of the trusses during construction and throughout their service life. This placement allows for effective load distribution and stabilizes the trusses against lateral forces such as wind and seismic activity.

Bracing located near the top of the trusses provides support against lateral loads, helping to prevent any potential sideways movement or buckling. Additionally, placing bracing on top of the bottom chords is essential for preventing sagging and ensuring that the trusses maintain their designed shape, especially under load.

The other options suggest inappropriate bracing locations or methods. For instance, placing bracing only at the middle of the trusses would leave significant portions without necessary support and could lead to structural failure. Limiting bracing to only the bottom chords ignores the need for support at the top, which is vital for overall stability. Stating that bracing is unnecessary overlooks the critical role bracing plays in ensuring the safety and durability of truss systems.