Blocking Along Wood Framed Hip
Blocking Along Wood Framed Hip
(OP)
I have a question regarding what you guys do at wood framed hips.
If you've got rectangular building with typical gabled roof at the middle of the plan and a hipped roof at each end, and the roof is framed with trusses, where the plywood decking terminates at the hip, do you guys detail blocking along that hip intersection of the plywood or do you take that as typical framing that is expected to be installed simply as "good framing"?
When an architect wants hip ridge vents, that further complicates providing blocking at the hip, because the plywood must be cut back from the hip to allow for airflow thru the vent.
How do you guys detail this......or do you detail that at all?






RE: Blocking Along Wood Framed Hip
In the case where the diaphragm happens to be stressed there to the point of needing blocking, I have put a row of blocking on each side of the ridge with a small opening in between to allow for venting. 1 to 2" seems to work, and the trusses can handle that.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Blocking Along Wood Framed Hip
RE: Blocking Along Wood Framed Hip
RE: Blocking Along Wood Framed Hip
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Blocking Along Wood Framed Hip
The blocking really is needed.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Blocking Along Wood Framed Hip
You'd think a framer would have enough sense to frame that blocking automatically. Seems like common sense to me.
RE: Blocking Along Wood Framed Hip
The trusses running parallel to the girder truss going up to the ridge were usually had the top chord dropped in elevation to allow for 2x's to be laid on their side as purlins so that the plywood could be run the same direction up the whole roof. I always requested this type of truss where it would work because it also made for a better system IMO.
These purlins made it very easy because you could run one right up the hip and it eliminated having to cut individual blocks which are usually a nasty compound miter and difficult to install.
RE: Blocking Along Wood Framed Hip
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RE: Blocking Along Wood Framed Hip
I used 3 o4 truss manufacturers routinely and all of them were able to provide the trusses like this when i asked.