Tracing the Load Transfer Path

1:10

1:58

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What happens here

This step illustrates the path of live and dead loads through the house structure. When loads are applied to the roof, they travel down the rafters, into the top plate, through the cripple studs, into the header, down the jack studs, and finally into the footing or foundation. The presenter also briefly mentions common roofing materials: slats for older homes and plywood or OSB for most modern constructions in the US.

Goal: Comprehend how weight from the roof is distributed through the framing to the foundation.

Tools and materials

Live/Dead Load Sign N/A — Representing the forces applied to the roof
Miniature Framing Model N/A — Illustrating the load transfer path
Pointer Tool N/A — Indicating the load path

What they say

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lumber for your project. A common roofing material for older homes is shingles. Frame hangars and many structures outside the United States use purlins. The most common in the US is plywood or OSB boards. When static and dynamic loads act on the roof, they are transmitted through the rafters to the upper strapping, through the short posts to the lintel, then to the support posts and into the foundation. This is how the weight is transferred from here down to the ground. Let's see what happens when we

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