Architect,  Generic

Heel Analysis


Heel Analysis Methods.

When I design heels for a truss, I try to not use more wood than I need. Throwing wood at a problem doesn’t always fix things. For example, I have a slider on this heel as the heels are high. The top chord doesn’t specifically need them for stability or deflection. I have a pinned bearing and I can analyze the heel with a few different methods. In these two illustrations the red line represents the analog of the truss.

screenshot single
single analysis

I analyze with a single analog on the heel and my slider is several feet long as the next joint is the web.

screenshot multi
matrix analysis

In the right most illustration I analyze with a matrix which checks several points over the heel and shorter analog lengths and a much shorter slider for the heel.

tree of knowledge

Analyzing with a matrix doesn’t always work and may make things worse in certain cases. I wanted to share but one of the many tools I use on a daily basis.

The amount of wood saved accumulates quickly. Saving a few feet of lumber on each truss when I send out hundreds per day adds up. Save a tree, save a dollar, save a plate, save the planet, save the whales, save the rainforests.

– Vandelay Industries

My name is Art Vandelay, I'm a truss designer or structural engineer which is like an architect. I follow the UNIX philosophy, do one thing and do it well. I have a few decades of experience working for large corporations maintaining high end servers for information services.

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