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Hi everyone, I encountered this under a basement of a house, kver 40 years old. There is a gap that appears to be consistent under the whole concrete basement slab. This is kne foot deep under the slab soffit. The grade under it is almost flat. Concrete footing surface along on the perimeter...

Thank you everyone for your insights and replies.. All highly appreciated. dik, speaking of fasteners, no anchoring of the metal column plates were installed at this site by the way. The argument is always that "meh, it's a residential house with no significant lateral loads"

Hi everyone, I saw this detail in one residential buildings in Ontario. It's a concrete footing of a tube steel column. The footing is located under the concrete slab in the basement. Between the slab and the footing, gravel was placed. Why wasn't the footing poured right at the slab level...

Yes I mean in my case. Would they be fixed and secured along the 2x4s to limit their shrinkage?

How would the engineered lumber be used go counteract fhe shrinkage of the 2x4s in this case?

Thank you Kootk for the illustration.

Thank you everyone for your kind responses. Regarding the lateral brace, is it because the joists are not attached by metal hangers? Cause I see joists bearing directly on beams in normal situations! Also, how could engineered lumber plates help with the shrinkage?

Hi everyone, We have a situation where the wood floor joists are not bearing on an LVL beam. The contractor suggested that the gap between the joists and the LVL be filled by shimming 3 plies of 2x4s. The 2x4s will be stacked one abkve the next one, where the smaller dimension (1.5 inch) will...

Exactly! I never find peace of mind with some calculations indicating it's ok to let such steel frames rest freely with no anchors, windlift ol or not! Regarding epoxy anchors, could be a solution once the dispute is settled!

Hi everyone, I reviewed a residential house last week in Ontario and I noted that not a single tube steel column in the basement is anchored to the footing (where footing or concrete piers were visible, or as construction photos show). The contractor is arguing that he consulted with an...

Thank you everyone for the replies. I'm not sure how deep the footing is. The contractor is arguing it's 4 feet deep.

Hi everyone, I have a situation very similar to the attached photo. A wood deck post is significantly off centred, and was installed right at the edge of the sono tube. How problematic is this? I know some footings can be eccentrically loaded, but this is a small sono tube, so calculating...

Thank you for your answers. What I need is a sample of the results shkwing vibration that is acceptable or excessive. I just want to take a look at the monitoring results

Hi everyone, Guidelines, related to construction vibration monitoring, present maximum allowed values for vibration parameters. However, these guidelines do not show how to look at the vi ration monitoring data and how to interpret them. Anybody has got samples of vibration monitoring data...

Hi everyone, I encountered wood joists which their actual size is 1.5 by 9 inch (exactly). They are SPF No.2. Why does it measure this way and how would these joists be checked using the building code tables? Would these be considered deficient 2x10? Or buffed 2x8?

Thank you TigerGuy. I prefer the same but as the code allows for granular fills with fine content, we don't always see clear crushed stones under slabs so we need to deal with it

Thank you very mich Eric and dik. I appreciate your input

Thank you for your answer. But isn't there a range to determine if test results are acceptable or too high for granular under slab?

Hi everyone, What's the maximum acceptable moisture content (humidity) of granular fill under concrete slab on-grade? I know it may differ from code to code, but what's generally the maximum that we shouldn't accept?

Thank you very much dik and bimr