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Plate Connection Design

Plate Connection Design

Plate Connection Design

(OP)
Hi,

I am checking an existing metal plated truss and am looking for information regarding the design of the connection plate for various joint types. I do have the original truss shop drawing.

The truss has numerous mis-plated connections and I am trying to determine the effect on the trusses' load carrying capacity.

Thanks in advance.

 

RE: Plate Connection Design

Get the ICC ES report for the metal plates. That will give you the design allowables for the plates. Do a Search for "ES report" to get to the ICC website.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

RE: Plate Connection Design

You might be able to befriend an engineer that works in that industry.  They could be most helpful and get you up on that learning curve much faster..

There are a bunch of them out of work - unfortunately.

RE: Plate Connection Design

Is there a simple rule of thumb for design of plywood gussets? I have a 10' span, 5:12 pitch, 2x4 cords & webs, kingpost design. I'd like to make the trusses myself and use plywood gussets.

RE: Plate Connection Design

The ES report will help but you will need to determine the plate manufacture. ANSI/TPI 1 is the referenced standard for design of metal plate connected wood trusses and gives joint design procedures.

RE: Plate Connection Design

Baltenhof, 10' span is very short to get too complicated. A 2x6 will span that for attic loads, and the rafters will be 5 feet long, so a truss is really not going to do much unless the loads are above normal roof/attic loads.  If you want to design plywood gussets, get a copy of the NDS.  Be mindful that bolts are the way to go (nails just don't give the kinds of capacity you will want before you split small members.

RE: Plate Connection Design

We're kind of starting a new thread here but oh well I guess. I'd stay away from bolts as they will reduce the net section of the 2x4 far too much. If you want more capacity try for an SDS screw by Simpson or similar. Also check the American Forest & Paper Association for plywood design & design values.

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