Recent content by Eng_Struct

Sounds like for the strip footing system to work, I need: 1. Find the load path through the slab in tension either via friction or tie to the foundation wall on the opposite end. (I only have 16ft of building length so there is not much to rely on friction - I will may introduce a key at the...

If I have to make it work, I will reinforce the slab on grade and tie the new slab using Hilti into the existing building foundation wall. Essentially the slab works in tension. The other thing I will need to consider is the passive pressure on the outside to make it work. I want to design it...

Thank you everyone for the feedback. Yes, the designer in the example I have provided appears to have specified the shoring of the wall before the placement of the slab. My question is if I do specify shoring of the wall and tie it at the top, does the wall become simply supported with...

Hi Group, I'm working on the design for a new expansion to an existing building. On the expansion side, the exterior grade is approximately 4 feet lower than the interior slab-on-grade elevation. The original building, constructed around 20 years ago, uses a standard strip footing and a...

Hi Group, The owner wants to create a new door opening 8ft x 8ft through an existing exterior precast concrete panel. In the past, I have reached out to the precast siding supplier who installed the panels and have them detail the reinforcing for opening. The panels are 20ft tall and very...

Correct. Can you please refer me to the clause/section of the code ?

The joint will be perpendicular to the thrust force. I don’t have any way to make the reinforcement continuous across the joint between new and existing, therefore relying on hilti dowels to carry the tension across the joint. There will be slab friction but i am trying to resist the load by...

I was thinking of putting struts on the outside of the building 6ft above the base of the column with deadman anchors (concrete block etc). I want to rely on friction but part of me thinks that the vapour barrier will reduce friction negating any beneficial effects. Yes, 10M is metric size...

The hairpins are 10 ft long on both side of the pier projecting into the existing slab 1X:2Y slope (y direction parallel to the frame). I am using the slab rebar engaged based on the failure zone below. The width of the developed failure zone with developed slab rebar comes out to be equal to...

Hi everyone, We're working on a project involving partial slab replacement in a pre-engineered metal building constructed in 1998. The existing 5" thick slab-on-grade (reinforced with wire mesh) includes hairpins from column piers for lateral thrust resistance. Although there is debate on...

The crane insaller and crane rail installer at the same entitiy. I have a 304mm wide flange with the depth between base of channel flanges 308. So there is not much room for cap channel to beam missalignment. Now I am thinking that the mistake could be due to the sweep in the member. I don't...

That would have been help. In my case, the are using hook bolts to install the rail.

Note that the rails are installed in a straight line - the the runway girders that are off. Sounds like being outside the allowable limits even by 4mm will be determental.

Hi Group, For one of my project, the contractor did not install the crane runway girders within the tolerence. The rails for crane are now at roughly 5/8" (15.9mm) offset from the centre of the web of the runway girder. Runway girder is wide flange beam with cap channel and has the web...

The stack is flue gas stack and will be made of steel. The foundation will be concrete. Thank you for the help!