Tracing the Structural Load Path
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What happens here
This step illustrates the complete load transfer path within the wall framing. The weight from the 'ridge' (the top of the roof structure) is transferred through the 'perlin' (purlin) beams, which in turn support the 'plywood' (roof sheathing). This load travels down through the 'double top plate' of the wall, then to the 'header.' From the header, the load is taken by the 'jack studs,' which sit alongside the full-height 'king studs.' The king studs extend from the top plate down to the 'footing' or 'foundation,' ensuring that the entire structural weight of the roof and upper floors is safely distributed to the ground. Additionally, other 'studs' (vertical framing members) contribute to the overall wall stability.
Goal: Trace the path of structural load from the roof through the headers and studs to the foundation.
Tools and materials
- Double Top Plate — The horizontal members at the top of a wall frame
- Footing/Foundation — The base structure transferring loads to the soil
- Header — The structural beam spanning an opening
- Jack Stud — The shorter stud directly supporting the header
- King Stud — The full-height stud next to the jack stud
- Perlin — Horizontal roof members spanning between rafters or trusses
- Plywood — Simulating roof sheathing
- Pointer N/A — Highlighting specific parts of the model
- Ridge — The topmost horizontal timber of a roof frame
- Stud — General vertical framing members