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I haven't had to do a seismic SDC D structural review in a while and would like some clarification. I am having another PE review the drawing, so I have some help there. That being said, I am reviewing a 1.5 story log house. It's rectangular with a 10' poured foundation, though the house has...

Gentlemen, Thanks for your input. I too get less rebar needed as I stated the situation. I should have mentioned that the wall is carrying about a 5000/ft axial load, which changes the design slightly, i.e. combined axial load with bending. Maybe that's ignored in residential foundation...

The wall is 8" thick and is broken into smaller segments because of the floorplan layout. In other words there are several bumpouts in the wall to accomodate sun rooms, porches, etc. The longest wall span is 24'. I have been designing the walls as a one-directional slab or vertical "beam." I...

I am engineering a house with a 10' tall, poured, basement walls. The soils engineer has indicated a equivalent lateral fluid pressure load of 81psf. The bearing pressure is given as 3100psf. Expansive clay has not been found...according to the soils report. It seems odd to have such a...

ICF is "insulated concrete form" Basically it's a reinforced styrofoam form that is left in place after the concrete is poured. The advantage being traditional wood forms are not required to be taken down once the wall is poured and the styrofoam, being on both the interior and exterior side...

I have a client that wants to place a cold joint in a foundation wall. It's a residential structure and the foundation is being constructed with ICF's. The builder is worried about blow-out at the bottom of the forms as some of the walls are 11' tall. His concern seems legitimate, though I...

To all, Thanks for your help. I normally do log/wood design and am comfortable with standard concrete beams, wall stuff, this was just a little beyond my comfort level. I have several wood engineering programs but nothing with the capability to design (or offer design suggestions) for two...

I am designing a structural slab to support a self contained hot-tub. The property has a significant slope and in order to have the tub at the same height as the deck, an "mini foundation" has to be poured. The walls are 9 feet tall and the "foundation" is 15' square. The home owner wants to...

Yes and no. It depends on which side of the basement wall you want to put the French drain. The basement floor slab acts the same was as the floor joists and does indeed keep the bottom of the basement walls from kicking in. The basement wall is designed as a beam tilted on its side with the...

I totally appreciate the suggestions, and I really like the idea of creating a rigid connection at the bottom of the post; however this is not an option either. Because it's a log house, I have to design for settling, allowing for two inches of total "shrinkage" from the top of the exterior log...

I am engineering a log house with a large covered porch. The porch roof is supported by 12x12 timber posts, which supports a 10x12 timber header laid flatwise. I need to created a moment connection between the post and header for lateral resistance, but can not use knee bracing (per...

I appreciate the advice and references. I have an independant geotech advisor/friend, who hopefully can give me a second opinion regarding the first geotech's soils report. Thanks for this advice.

Does anybody have any recommended references for foundation design with expanding clay type soils? The design I am working on is residential. Any thoughts regarding design in this type of soil would also be appreciated. thank you, Alex

UcfSE thank for your help. The 1567 includes the full load across the beam, as do the bearing calcs. The only place I have taken a reduction is according to 3.4.3 for the shear loading. It all seems correct, but it just seems odd to have a reaction load higher than the shear capacity. When...

I am checking the design of a simply-supported, notched timber purlin and need some advice. Based on the NDS section 3.4.3.2, I have calculated the shear capacity of the notch, which is on the tension side on each end of the beam. This calculation yields of capacity of 1402 pounds. If I...