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#66460 06/05/06 01:23 AM
Joined: Aug 2005
Posts: 251
T
Member
I know I asked before here about drilling lams and was refrenced to the drilling of engineered joists thread. So here is the proper information. Page 19.
http://www.rosboro.com/techref-glulam/techguide060326.pdf


Shake n Bake
#66461 06/05/06 07:03 AM
Joined: May 2003
Posts: 2,876
E
e57 Offline
Member
They are all brand specific, another manufacturer may require/allow something else.


Mark Heller
"Well - I oughta....." -Jackie Gleason
#66462 06/05/06 08:58 PM
Joined: Jan 2005
Posts: 5,445
Likes: 2
Cat Servant
Member
I'm going to have to disagree about that "manufacturer specific" caution.

The sheet referred to in this thread, as wellas other artwork referred to in discussions about I-joists, are nothing more than gussied-up versions of what is available from www.apawood.org

This is the website of the "Engineered Wood Association," a trade association that operates in a manner similar to NEMA. It is safe to consider their info to be "industry recognised consensus standards."

Of course, you still have to know the material you are dealing with!

#66463 06/05/06 11:20 PM
Joined: May 2003
Posts: 2,876
E
e57 Offline
Member
"know the material" And its loading, and, and, and.....

The safest bet is always the engineer responcable, and if not the data for THAT manufacturer, as 'gussied up' wont cut the mustard when the big $$$ back charge is in contest. CYA!

[This message has been edited by e57 (edited 06-05-2006).]


Mark Heller
"Well - I oughta....." -Jackie Gleason
#66464 06/06/06 04:22 PM
Joined: Aug 2005
Posts: 251
T
Member
If your pushing the limit with 1 1/2" bits, multiple holes, etc. you should use the data from that manufacturer.

If you stay safely in the guidelines. Your good.

Know the material.. its wood. With a round hole. The info from the Glulam and I joists is relative in 1 main way. Stay in the middle.

Other manufacturer specs should be close to, if not the same.

IMO.


Shake n Bake
#66465 06/06/06 11:21 PM
Joined: Mar 2004
Posts: 814
B
Member
What about the glulams with the pre stamped holes every 18 inches or so? They are not really punched thru very far, but are they intended to be knocked out (more like beat out) with a hammer? Is it okay to knock them out from any section, since they run the full length of the beam?

#66466 06/07/06 03:53 PM
Joined: Aug 2005
Posts: 251
T
Member
BigB thats the I joist we are talking about. I call em engineered floor joists.. but don't really know what they are called.

Heres the link for that tread. https://www.electrical-contractor.net/ubb/Forum1/HTML/006716.html

After re reading that thread I see e57's has a bunch of bad stories about drilling lams.


Shake n Bake
#66467 06/07/06 07:41 PM
Joined: Jan 2005
Posts: 5,445
Likes: 2
Cat Servant
Member
Whatever the rules may be, one thing drilling structural members and roofs have in common is:

If you screw up, it's going to cost you plenty to get it fixed if you're wrong.Be double sure you're right!

[This message has been edited by renosteinke (edited 06-07-2006).]

#66468 06/08/06 07:45 PM
Joined: Feb 2002
Posts: 375
G
Member
If the structure is engineered, you need permission from the engineer before you can put any holes in any member.

#66469 06/09/06 12:17 AM
Joined: May 2003
Posts: 2,876
E
e57 Offline
Member
"I see e57's has a bunch of bad stories about drilling lams"

Darn straight I do!

I even know a good post tension story, I was in the building at the time, and knock on wood it wasn't me. [Linked Image]


Mark Heller
"Well - I oughta....." -Jackie Gleason
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