Pilasters Integral with a Masonry Wall

[PEFLWI]

I am designing 12" masonry wall. I need to have 16"x16" pilasters integral with the wall at 10'-0" on center max. Is it important that I space the pilasters at an increment that is an even multiple of 16", i.e. 9'-4"

Thanks

 

[jayrod12]

I would argue that yes you should keep them incremental.

 

[KootK]

It would certainly be nice but I wouldn't say that it's necessary. Fewer and fewer architects seem to be paying attention to modularity. And masons seem to be fine working around that for the most part. Certainly, if it's you doing the deciding, then be clever and go modular. I think it would be enough to be an even multiple of 8" rather than 16" if that helps. Depends what kind of pilaster block you'll be using I suppose.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[PEFLWI]

Thanks for the help. Do either of you have pilaster block details you are willing to share? The only details I found are from the Masonry Handbook by Amrhein.

 

[azcats]

12" CMU wall with 16" pilasters will be interesting to lay. Do they make a block shape where you can build it without having a vertical mortar joint the whole height each side of the pilaster?

 

[JedClampett]

Check the NCMA TEK manuals. They're pretty likely to have details, although maybe not the exact one you're looking for.

 

[concretemasonry]

Jim's book and pilaster details were based around southern California products and shapes commonly used there.

The NCMA handbook is very good, but shows a number of methods used in different regions.

I suggest looking at local brochures to see what is available there near the construction site. Designing with the knowledge of what is available as opposed to selecting from various proposal as the contractor builds.

Generally, the term "pilaster block" can also be used for specialty units that work for both 12" and 8" walls.

I would definitely stick with a 16" module, especially if architectural or colored units are used for the walls.

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.