Crane Boom – Triangular Cross Section

Written by TJ on June 11th, 2009

One of my next projects is to build a simple tower crane. I’ve developed a new turntable (more on that later :-) ), and I’m working on a boom with a triangular cross section.

It’s not too hard to make a triangular cross section, but it’s an added challenge to create a design that will transition between sections of different heights.

This design (below) makes use of a truss chord on the top that is oriented normally. This allows the height of the truss section to change along its length fairly easily (it’s the link between sections that becomes very difficult unless the top chord is oriented normally).

click for larger

click for larger

My goal is to build the boom of the tower crane as a cantilever type and not use guy wires as typically seen on many tower cranes. The tower base of the crane will make use of the boom sections I built for the crane project.

4 Comments so far ↓

  1. Jun

    That’s great for looks, but it’s hard to imagine that it will hold weight as well as your other designs.

  2. Jun

    Thanks, Fred. It’s actually stronger than it looks. But then it’s not quite a strong as some of my other truss designs. I’m kind of curious to see how it will turn out. I need to get it mounted to a fixed based and put some weight on it :-)

  3. Jun
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    Discovered your post fascinating to peruse. I cannot hold up to see your post soon. Good Luck for the up and coming update.This article is truly extremely fascinating and successful.

  4. Sep
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    You need the section modulus or the moment of inertia for the shape. The rest is standard fare…

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