Portal Frame Roof Truss

Roof purlins and wall girt not only support the roof and walls but also provide lateral support for the main structural beams and columns which form the secondary framing of portal steel frame buildings.

Portal frame roof truss.

It is the primary framing. The major components of a portal frame building are a series of parallel portal shaped frames as the major framing elements. These include steel reinforced concrete and laminated timber such as glulam. A portal frame building comprises a series of transverse frames braced longitudinally.

Each frame is rigid and resists horizontal wind forces and gravity loads in the plane of the frame by flexural action. Portal frames and portal truss structures are two of the most cost effective and sustainable structural forms for the design and construction of long span industrial buildings. Portal frame structures are designed to span between supports and rely on fixed joints with moment resisting capacity where vertical supports connect to horizontal beams or trusses. The primary steelwork consists of columns and rafters which form portal frames and bracing.

Post frame roof truss 23 residential end frame 1 residential roof truss 88 style. When making a selection below to narrow your results down each selection made will reload the page to display the desired results. Steel columns roof beams and bracing systems constitute the primary force skeleton of the portal steel frame.