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Hey guys, Working in a post disaster category steel portal frame building in Ontario, Canada. We're adding some misc metals to the building which was erected about 10 years ago. While on site and while looking through the drawings, I like to imagine load paths. The building contains portal...

Hi All, I'm designing a set of free standing interior stairs which access a mezzanine. Distance from mezzanine to ground level is about 3.4m. The EOR wants the stairs to be freestanding to avoid any point loads on the mezzanine which consists of hollow core slabs. In this case, is it reasonable...

Hi All, Thanks for the great feedback. Here's my best shot at addressing your comments. @phamEng - I got wind that a large engineering firm was charging $2800 CDN. That seemed a little low. I figured I was going in around $3500 to $5000 @ Dave Atkins -scissor lift is provided and I'm the...

Hey guys, Looking to get a sanity check on reasonable rates for a structural analysis. I've had a few projects that involve the evaluation of an existing OWSJ for additional loading (i.e. rooftop unit, pipe hangers, etc). Here's a breakdown of what the work involves: 1. Site visit for OWSJ...

Hey guys, I'm evaluating the capacity of an existing OWSJ and am determining whether or not reinforcement will be required. Client wants to give occupant access to the roof area (additional 4.8 kPa loading). I'm using Skyciv to determine the factored loads in each member. A coworker has me...

Thanks Hokie and Jayrod. I love that idea. Get that connection closer to the inflection point. Unfortunately the architect has shut that idea down since they are concerned the splice is much more visible in that case. Sigh.

Thanks IceNine. That's a great point about additional shear on the bolts.

Thanks PhamENG. Unfortunately there's an HSS tie beam connecting each portal frame at that point. See highlighted member below:

Hi All, Currently exploring different options with the architect for the eaves connections in an exposed steel portal frame. The roof angle is relatively high (about 33 degrees to the horizontal) so the roof angle needs to be followed all the way to the far flange of the column (as opposed to...

Thanks for the responses. This is what I could find in the Canadian OH&S: https://www.laws-lois.justice.gc.ca/eng/regulations/SOR-86-304/page-2.html I'm really seeing no requirement at all for these stairs in terms of rise, run, and landings.

Hey guys, I'm laying out a set of interior stairs that will provide roof access for maintenance (monthly access for changing filters of some kind). This is a large factory (>600m^2) and the client wants to keep the footprint of the stairs to a minimum. Stairs are preferred over a ladder as the...

KootK and Jayrod12 - Thanks for the very useful points. Give me some time to address each of your points so my response is succinct and constructive. In the meantime, let me shed some more light on the situation. 1. The hot tub is on one structure and the 5" concrete slab is on the other. In...

KootK, you are the best. Thanks so much for the intelligent comments. I'll address your comments and perhaps spark more points. 1. I completely agree. Although I show beam members 28 and 29 in the picture, I have evaluated both structures as independent. Point loads have been used in place of...

Hi All, Looking for some opinions on the design below. It’s an outdoor patio which is only connected to the adjacent structure at the top of the three columns in the right side of the picture below (supporting overhanging roof structure). For scale, the platform consisting of wide flange beams...

I would consider this more of a pinned connection if only the web of the beam is connected to the fin plate. If you want to transfer the moment from the beam and into the fin plate, I would think that the flanges should be connected to the fin plate. Assuming you can transfer the moment into...

Thanks for the helpful comments everyone. I've added a picture below to better explain the occupancy loading I'm hoping for on my deck. Lots of valid concerns here.My thoughts below. If I can't get more information on the glass piece, I think I'll scrap this idea. 1. Do not use the glass...

Hey guys, I'm designing and building my back deck. I've got an opportunity to use a 5' x 6' x 5/8" thick piece of glass that my friend salvaged from a Victoria Secret runway (high five). I have zero experience with the mechanical properties of glass. For those of you with experience, I would...

Originally the beam was continuous. This is a retrofit and the slabs were not originally designed to take the additional weight of the heat exchangers so these are reinforcing beams. The contractor is requesting the splice because it will be nearly impossible to get the long continuous beam into...

Good point XR250 (Honda ref?). My drawing isn't to scale. I'll confirm accessibility with the contractor. There will have to be a weld in there.

Hey guys, Contractor is requesting to splice a beam for easier installation access. These beams are placed below a slab (grout gap) and are used to support the existing slab for additional equipment (heat exchangers). The contractor has requested the following splice. All fillet welds...