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Posted by Michael Bulatovich on April 30, 2007, 8:53 am
>
>> I'm putting together plans for 12'x16' shed. I'm planning on using an
>> end supported 16' long ridge beam to avoid using rafter ties. Will a
>> 16' 2x12 be sufficient, or should I nail together four overlapped 8'
>> 2x12s? Can I get away with using 2x10s?
>>
>
> Whatever you use for the ridge beam and rafters to support the roof you
> need to consider that without the rafter ties there will be a lateral
> force at the top of the walls tending to push out the side walls. To
> prevent this you need to have a well nailed roof sheathing to act as a
> diaphragm that takes these forces to the 12' end walls. The diaphragm
> will also be used for lateral wind forces/seismic depending on the area
> you are located.
>
> CID...
Not if the ridge beam is supported. That's the whole idea. Supported ridge
beam **or** collar ties.
--
MichaelB
www.michaelbulatovich.ca
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