Framing Your House (cont. p. 13)


Open-Web Truss
 

The open-web truss makes for very simple routing of wiring, plumbing, and duct work.  That can be a significant factor.

 

2x boards and I-Joists have severe restrictions on the size of holes that you can drill or cut into them.


These are building code restrictions designed to protect the structural integrity of the joist.


One type of open-web truss has solid wood end sections which you can cut and trim, allowing for on-site framing adjustments.

 

 

Other than the solid end section, open-web trusses cannot be cut at all, and must be installed as manufactured.

That means that your foundation measurements had better be in precise accordance with your plan.



If not, your wall framing measurements can be off what is shown on the plan, and that could mean you’ll have joists which don’t fit what you’ve already built.


The trusses will be custom-built for your job, based on the plan that you submit.  As long as the truss company builds the trusses to the measurements noted on your plan, you have to accept them as built.

Note the square-shaped openings in the trusses in the photo.  This was a custom design to accommodate the routing of duct work.

You should consult with a heat & air contractor prior to ordering the trusses, verifying the size of the opening his duct work will require.

Ordering of trusses should be done well in advance of the beginning of framing to allow for production time.



 

Read more about Framing...

 

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