"Mike Clarke" wrote in message
...
In article , IMM wrote:


"Bob Eager" wrote in message
...
On Fri, 12 Nov 2004 13:46:22 UTC, "IMM" wrote:

Is there any preference between straight cut ( |_| ) or 'U'
shape
notches
Makes no difference.
of corse it makes a difference! a joist with a smoothly shaped "U"
will be far stronger than a straight cut slot.

nope. Regs say no problems with a straight cut. Duh!

He never mentioned the regs. But structurally, a U shape will be
stronger. Read the famous 'Structures' book...

But it still will not make any difference in this case.

But the original question was "Is there any preference between straight
cut ( |_| ) or 'U' shape notches ?". The U shape will be stronger so
would be preferable even if the regs don't require it.

The beam is not weaken any less by having a U shape.