Cutting a Timber Beam

[pelli69]

I am installing a timber beam to allow for the removal of a wall
The timber beam will support roof struts and hanging beams.
I need to cut the ends of the new beam at the supports to suit the roof pitch so I can physically fit the beam in
What are the rules as to how much of the end of the beam I am allowed to cut?

 

[woodman88]

Under the IBC/IRC for sawn lumber the NDS shear design should be followed. For GLB the AITC Technical Note 19 (a free download at

http://www.aitc-glulam.org)

should be followed.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

 

[hokie66]

It sounds from your post that you are not a structural engineer, and if that is so, you need to retain the services of such. When you cut back the end of a wood beam to fit under a sloping roof at the eave, there is generally not much capacity left. Maybe you need a steel beam.

 

[msquared48]

Hate to say it, but it depends on the situation. If the beam is shear critical - none. If not, then a varying degree depending on the level of shear stress in the area of the cut.

As Hokie said, get a local structural engineer to help you.

Mike McCann
MMC Engineering

http://mmcengineering.tripod.com

 

[pelli69]

thanks guys - sounds like i need to engage an engineer - was hoping there might of been standard rules to follow