Good point dflva. Contractor and engineer could both work for buyer after closing if buyer and seller could negotiate based on cost of repairs. Otherwise, contractor working for seller and engineer working for buyer might work, but it sends up a red flag to me as setting up an adversarial...
I think in most cases of of residential underpinning, in general, the piles are assumed to carry only vertical loads and are "designed" that way. I am not aware of any other design or construction actions intended to provide lateral resistance to offset a theoretical reduction in lateral...
TRAK, some good feedback has been given so far based on the experience of other posters, but I think you can gather from the information provided that helical pile underpinning for residential foundations is a bit of a mixture of wild west installation contractors doing it their way and a bit of...
Is this a commercial building? Are Special Inspections per IBC Chapter 17 not required? SteelPE, are you performing the Special Inspections? If not, what has the Special Inspector reported for verification of the grout space prior to grouting? Special Inspections, which are really sort of a...
OP, what was the nature of this engagement? Was this a residential structure? You didn't say. You just said the client wanted the report to look like a house-inspection report. If this was for a residential structure, I will assume you were paid relatively little money for this structural...
Don't space the roof trusses at 16". You will be a pariah if you do.
Don't space your wall studs at 24". You will be a pariah if you do.
Given the above two statements, it obviously isn't important at all that your trusses align with you wall studs, although in a perfect world we would all...
Generally, sheathing on only one side of wood studs is considered adequate for continuous weak axis bracing of the studs for studs up to 2x6. This is buried in the NDS somewhere. I'm not sure if the NDS includes the part about "up to 2x6", and I'm not sure if the NDS explicitly addresses just...
Blanket design the whole deck for the max load of 150-200psf. You can't control where they might put the hot tub. Cover your a$$. No warnings necessary. Just make sure they understand that the deck is being designed for 4-5 times the normal load on a residential deck, so they have to expect...
Like Celt83, I prefer to use cast in place, standard heavy hex head anchor bolts, rather than post-installed or proprietary. Regarding the placement of that top edge bar, I think if you draw the hooked bar to scale, you will find that placing the edge bar in the "knuckle" will have it nowhere...
AKSherpa, the rest of the wall is in relatively good shape. There is one section that is stained from water overtopping and running down the face, but the wall doesn't show any other signs of significant damage or deterioration. The bottom edge of the undermined blocks does look somewhat...
Jrit, the blocks are not set on concrete. They appear to be set on an aggregate base, but I do not know the width or thickness because I did not do any excavation. It does not seem to have the dimensions of a typical aggregate base leveling pad, since the bottom of the blocks is at or above...
geotechguy1, I have no idea what the original design documents say about embedment because this thing is 20+ years old and there are no records of the original design documents, but we all know that proper design and construction of segmental retaining walls requires the base blocks to be...
Dik, the wall is not leaning, that is just an optical illusion in the photo. The wall is batttered as usual, i.e., each course of block is setback 1" from the course below. The stepping I am referring to is different. I mean the bottom elevation of the wall steps up periodically as you move...
SlideRuleEra, I was already concerned about potentially excavating directly adjacent to the front of the wall, so I like your suggested modifications to my original concept sketch. I am leaning toward recommending something like your sketch.
MTSOE, this wall is located behind a row of...
Maybe something like this?
The intent of the underpinning concept shown in the sketch would be primarily to act as a bulkhead to prevent further undermining by loss of aggregate base from underneath the base course of blocks.
Thoughts?
I am assessing a situation involving an existing segmental retaining wall (SRW) that is undermined at the base course due to inadequate embedment of the base course(s) below grade. The wall is approximately 150 feet long
and approximately 16 feet high (maximum). The adjacent grade at the toe...