Primary Beam: A horizontal beam connecting columns (simply supported or shear connected.) Function: It will transfer the load from secondary beam(if present) to the columns.
Secondary Beam: A horizontal beam connecting primary beams (simply supported or shear connected.) Function: It will transfer the load to the primary beam and not directly connected to the columns.
Tie Beam: A horizontal beam connecting two rafters in a roof or roof truss.
Function: This beam will transfer the rafter’s load to the column of the structure. Usually used in roof truss.
Tie beam that ties the foundation at different level may be abbreviated as: Plinth beam at Plinth level Ground beam at Existing ground level
You will know about different types of beam such as primary beam secondary beam , drop beam,inverted beam etc.
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