Hi All,
I have some upcoming projects that might require some fairly complex plate models - in anticipation of that I'm running through practice models to get a feel for some of the issues I might face. Specifically, I'm looking at modeling closed rib orthotropic bridge deck. The model will...
This just happened yesterday in rural Nova Scotia. The bridge was scheduled for replacement. Collapse took place while the contractor was moving equipment in to start the work. One worker in hospital (assuming the truck driver).
I of course don't want to see anyone get hurt, but I find these...
A silo holding fly ash exploded the other day. Blew the roof off and landed 250m away. News story linked below. I read another story that said the silo was pressurized. Not so much an engineering failure, but maybe a failure to provide some engineered controls to prevent this...
Hi All,
I have a situation where I need to support a new steel beam on an existing slab. For a number of reasons, my beam elevation is fixed. And again for a number of reasons, I can't support the beam on the edge of the concrete slab, or the cantilevered portion of the slab(see attached...
Hello all - I am looking for some advice, specifically from Canadian engineers, but all input is welcome.
I am currently employed by a contractor and I am considering starting a small business offering consulting services - area of practice would be structural and likely mostly in the...
This just happened yesterday - thought I would put the video up for your viewing pleasure. Luckily no one was injured.
Demo accident or just really efficient work?
https://www.youtube.com/watch?v=Wxe588uU1S0
Hello All, just wondering what others do for ICF inspections. I've never had to provide inspections for ICF walls before...I have a small residential job coming up shortly where it will be required. Its a typical residential job and I am not too concerned with checking every square inch of the...
I am looking for some references to determine the effective length to be used in compression chords which are laterally unsupported. Application will be similar to a pedestrian bridge where the top chord only has the web members to provide lateral support.
I've been on www.cidect.org which has...
I had seen the yield line method mentioned a few times here on E-Tips and have been doing some reading on the subject. I would like to start using this method in practice. There are lots of great articles and references online (I found the link below very informative), but I am more of a...
A friend of mine is building a house and he recently noticed his foundation walls have started to push inward. I looked at the walls, which had cracked badly and he showed me the line he had strung to measure the deflection of the wall. Three of the four corners of the house have cracks starting...
I'm wondering how to address the following setup:
I have multiple anchors installed in concrete. The anchors are close enough that the break-out cones overlap. However, the anchors will not be loaded at the same time.
I don't have any set dimensions I'm applying this to, I just need to know...
I have a situation where I need to anchor something at the edge of a slab and space is at a premium...
I was thinking of placing dowels into the vertical face of the slab (about 10" thick) with epoxy, placing a plate with holes over the dowels and plug welding the plate to the dowels. I'm...
I'm looking for a little guidance on how to analyze this situation.
This will be applied to a job eventually, but for now I'm just trying to get the concept right.
For discussion sake I'll add some dimensions...
I have a 10' steel beam, 8' of the beam sits flat on a slab (I assume the slab is...
My parents have always drilled it in my head that ice has to be at least 6" thick before I could go skate...which was hard sometimes as a young child because I could see the older (and less supervised) kids out playing hockey on the thin ice.
I'm sure 6" is the safe number, and I'm not about...
I've heard people talk about how these types of wooden joists, the ones with a plywood/OSB web, don't hold up well in a fire.
I'm just about to do some searching on the internet...but I was wondering if any of you have had any direct experience with how well these types of joists resist fire.
Hello, I have a situation where an aluminum track will be fastened to an existing structure with grade 5 bolts. The contractor installing the bolts said he will use a copper anti corrosion inhibitor between the steel and aluminum. The aluminum track is being used to clean windows on a high rise...
I'm working on a project involving a roof that is about 80'x60' and about 22' tall at its peak. The roof is being built on the ground and then lifted onto the main structure which is about 40' above the ground. Right now I'm trying to determine how the wind is going to act on the roof. I...
