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@phamENG, didn't get a chance to do that yet

@jayrod12, yes, it is. The designer used the foundation wall to support the steel posts, didn't increase the loading area. It completely relied on the foundation wall to spread the high point loads from posts.

Thanks for all your inputs. It is really a great chance to discuss with you all here. 1. To allow you all see clearer the design, I attached one section of the structural drawing from basement to second floor. P6:HSS 4"x4"x1/4" column, B17 = W10 X 45, B18 =W10 X 54, B19 =W12 X 50, B20 = W12 X...

Thanks, @a_urbs. Very appreciate your suggestions. As I have the drawings, I do have the intention to run all the calculations myself to see how does it look.

Thanks for your reply, @SWComposites. I didn't eyeball the foundation. I have the design drawings. That triggers my deep interest.

Thanks for your reply, @a_urbs. I know the information is limited here. If you need more information please let me know. I can give so we can have further discuss. And yes you are right, this is a high end house, worth more than 6 million. I want to initial the discussion that the steel post...

Hi there, I saw it a couple of residential houses design drawings. The designer used steel beams (like W10x45, W12x50, even W14x90) for the second floor load and one end of beam was supported by steel column (HSS 4"x4"x1/4"). However, the column was placed at the exterior foundation wall. I am...

Thanks for your comment. @lexpatrie. And yes, ASCE 7 only specifies the minimum loads, but ASCE 24 covers the flood design. It looks the previous design was not overdesigned but underdesigned. The engineer didn't consider the flood situation at the conservation area but when my client...

Great and thanks for helping, Jerseyshore. I will dig into that manual.

Thanks, JStephen. It seems I have difficulty to get access your presentation. Just wondering for flood, like 0.8m above existing ground, should both hydrostatic and hydrodynamic loads be applied to the ground floor walls and also the foundation? Also, for the hydrostatic load at foundation...

Hi there, I have a client already having the design drawings in Toronto. But the engineer didn't do design for the flood pressure, including hydrostatic and hydrodynamic loads. He doesn't like the previously engineer so he reached me for help to do some calculations for the current design or...

Hi Lomarandil, thanks very much for your suggestions. since the actual track size of one excavator is much smaller than half of the deck, is it reasonable to consider the excavator as point loading (factored of course)? Also, regarding the bridge capacity as the demolition goes, what are the...

Thanks, BrianPetersen. I think I get what you mean.

Thanks for reply, dik. I did see excavators on bridge to demolish the deck. There are girders supporting the deck so it is safe to demolish the deck after the structural stability check.

Thanks Lomarandil. It is a topic I am assigned to solve. Not for a real client. I also have a question for excavator load distribution, how should I distribute the weight excavator on the girder? Since the bridge is long and there will be only one excavator on half of the deck, should the load...

Thanks, Enable. I will post at one topic section moving forward. The client would like to make sure the old bridge deck is safe when both excavators are doing demolition work. Because the excavators will start demolition in the centre of the bridge toward both abutments. In other words, the...

Hi there, I have an issue here. A bridge deck needs to be demolished by two excavators from both side. now the client requests to do a structural analysis when the excavators are in service. I have the excavator parameters like weight, size, etc, and the drawing of the bridge. I was wondering...