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Insufficient bar joist bearing

Insufficient bar joist bearing

Insufficient bar joist bearing

(OP)
I am investigating an existing building (approximately 1 year old)which has a roof system of bar joists/girders.  One particular joist bears only 1-1/2" on the girder.  The bar joist specifications require a 2-1/2" bearing. There is another joist on the opposite side of the girder at this location with sufficient bearing.  Is there a way to reinforce the "end" of this joist or should I add a "seat" to the girder to obtain the required bearing?

RE: Insufficient bar joist bearing

If the building is that new, you should be able to get a recommendation from the joist manufacturer.  I've seen it done both ways, but 1-1/2" is pretty short.  If access is limited, adding a seat extension may be the only way you can go.

That's usually caught by the inspector, if there is one.

RE: Insufficient bar joist bearing

Only way I've done it is with seat extensions.

RE: Insufficient bar joist bearing

I think the joist supplier/designer should be able to come up with joist seat extension design to increase the bearing to the minimum of 2.5 inches.

I have seen this done on past projects and it works fine.

I am curious why are you investigating a one year old structure?


Regards,
Lutfi

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