Good Construction Practices-Joining Walls to Roof

Good Construction Practices-Joining Walls to Roof

Connecting walls to roof structure. Join walls and roof to strengthen each other.

·       Column reinforcement has to be protruded from the top of columns and be bent around roof trusses for structural strength, or roof trusses should be strapped with metal ties to the wall structure.

·       Exposed metal must be painted with rust proof paint to avoid corrosion.

An example of binding roof trusses to building structure. Roof trusses should be constructed over columns, and for a concrete column the reinforcement should protrude at the top and be bent over roof trusses to join the roof structure with the wall structure. Metal straps or plates can be used for this role, particularly where the building structure is made of wood.

A good roofing example of column steel reinforcement bent over roof truss to tie house structure to the roof structure. This is an essential detail in areas subject to earthquake and to winds, to keep the roof on the house when a natural hazard strikes the structure. Such exposed steel should be painted with rust-proof paint to minimize corrosion.

 Example of good roofing practice. Steel roof trusses are connected to columns through welding of truss members to column reinforcing steel and purlins are welded with ties to roof trusses. This will hold the roof firmly on the house in storms or other hazards from nature.

 Example of incorrect roofing practice. The roof structure is good, but no connection is made between roof trusses and the building structure. The roof is resting on the top of the house walls and is subject to moving with high winds or other forces of nature.