ledger angle - suspended slab

[zahzoo]

I'm just getting started with this steel project. First, where do I find specifications, examples, commentary for ledger angle connection between a suspended concrete slab to a CMU masonry wall?

 

[enloe]

My advice would be to be very careful in attaching to a CMU wall of unknown construction. Simple masonry construction, without bond beams, or vertically filled cells are not very stron when loaded off center with a device such as a ledger. If the slab you describe imposes it's full load on the ledger, the fasteners with which the ledger is connected to the wall will be in shear, thus making the shear strengh of the fasteners an issue. Secondly, even with the highest quality and appropriate number of drill in anchors, CMU itself will not support a great deal of shear, due to the low compressive strength of CMU, even if the drill in anchors penetrate a poured in place structural bond beam. It is much better, if possible to allow the slab to bear on a portion of the top of the wall at that elevation if that is possible.

In any case, these days connections like this are dependent on the quality of the workmanship in the field which is getting more suspect by the day. (Will all of hte anchors actually hold) If you don't design something fool proof for construction, it can very well come back to bite you.

Some of the older Building Construction Handbooks, published by McGraw Hill have a great deal on masonry to steel connections. They can be found very cheap on

http://www.bibliofind.com

which is now part of Amazon.com used books. The older books have a wealth of info not covered in the newer writings.

enloe
enloe1@cablelynx.com

 

[zahzoo]

Would ASCE 3 address this sort of thing?