Recent content by jeng123

I want to augment an existing typical 10x20 continuous residential concrete foundation w/ masonry stemwall for additional loading. I am evaluating the following two approaches: 1.Pour an additional strip footing width (say 10 to 18 inches wide) w/ same thickness and at same elevation as the...

I would like to but trusses are older, don't know the supplier and it would be a miracle if they still had the drawings

I have some existing pre-engineered wood trusses on a house that I would like to cut back because the bearing location is being moved in toward the ridge.The trusses have a 12:12 pitch and currently spans 25' the trusses would be trimmed back approx. 5' and new bearing support provided. I am...

Since the main benefit of control joints in a s.o.g. is crack control, what other benefit does it provide since you don't see the cracks anyways?

Do you specify control joints for residential slabs on grade for areas that will be covered by flooring?

hokie - thanks for the comments. yes I'm with you...with the pin-pin design assumption the outside face is most efficient placement for flexure reinf. the cantilevered ret. wall assumption is a different matter... regarding your statement "I wouldn't worry about the footing rotating" so even if...

hokie-why do you say near the outside face...wouldn't it be best to maximize the "d" distance for flexure of the wall?

thanks for all the comments! now say this wall is more like 10 to 11 ft exposed solid grouted 8" cmu w/ #5 @24" o.c. designed by assumming the wall pin-pin. For the foundation I propose designing it conservatively as pin-fixed(at foundation) assuming the foundation accepts some moment. I'm...

thanks for the responses. Mike-although I like your method I think I would get push-back from my contractor on the welding. hokie-i agree it doesn't take much force to tie back the top of the wall but since I don't want to rely on the concrete's rupture strength I will need to develop some...

When a typical slab on grade/cmu stem wall foundation (see attached) starts getting higher lets say over 6 ft (exposed face above grade) would you analyze as a cantilever retaining wall? or could you assume you have a pin-pin with the keyed in slab holding back the wall? I often detail dowels in...

abusementpark - a boundary element needs to transfer both compressive & tensile forces. How will discontinuous blocking work for tensile forces? That is why double top plates are typically specified with minimum lap splices right?

If you have a wood diaphragm comprised of wood floor trusses bearing on an intermediate stud bearing wall, how and what is engineered as your diaphragm boundary element? See attached detail. Thanks