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RE: Valley Rafters

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Valley beams are definitely design-worthy. Hip beams….maybe not so much.

 

Rationale is the deflection (gravity) for valley rafters is detrimental to what’s below. Hip beams have all those nice rafters helping it along.

 

I would not, however, refer to either as a “rafter”.

 

Barry H. Welliver

barrywelliver2(--nospam--at)earthlink.net

 


From: Avicpeng [mailto:vicpeng(--nospam--at)telus.net]
Sent: Friday, September 09, 2005 4:21 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Valley Rafters

 

What would you consider "iffy"?  BTW I'm not just asking dumb questions here.  I'm putting together an engineer's retort to, "... Do we need such a large valley beam?  Can't we just stick frame it? ..."


Thor Tandy P.Eng MIStructE
Victoria, BC
Canada
vicpeng(--nospam--at)telus.net

----- Original Message -----

Sent: Friday, September 09, 2005 3:13 PM

Subject: RE: Valley Rafters

 

Yes, since the member size/type will depend on the geometry and span of the valley rafter/beam.  Based on experience, I would determine if the span/load required a detailed calculation.  For standard stuff, I won't do a calculation but anything that is iffy I check it out. 

Seth W. Cutler, P.E. 
Silverdale, WA
e-mail:  seth.cutler(--nospam--at)navy.mil

-----Original Message-----
From: Avicpeng [mailto:vicpeng(--nospam--at)telus.net]
Sent: Friday, September 09, 2005 15:04
To: SEAINT
Subject: Valley Rafters

And just to start ... does anyone design the valley rafter of a roof, or do you write it off as "standard framing"?  If not, why not?  If so, why?


Thor Tandy P.Eng MIStructE
Victoria, BC
Canada
vicpeng(--nospam--at)telus.net