Hey folks, a customer came to me with concerns about the following situation. We've got two courses of block on top of a wall footing that are fully grouted and have started to form hairline cracks. I'm wondering if the grout is expanding and contracting, and maybe that's what's causing the...
Hey folks, I was called out to look at a new building where hairline cracks have appeared in the block over cold joints in the strip footing underneath. The customer says he'll be satisfied as long as it doesn't get any worse. I'm thinking of epoxying rebar into the existing footing and...
Thanks, everybody. I can tell you that the trusses have plenty of bearing on the block. I have no information on vertical rebar (or lack thereof) in the walls, but I can investigate that. But clearly Cliff is correct that there's no corner joint reinforcement. I will figure out the wind...
Hey folks. I just visited a block building in which both the front and rear walls are separating from the rest of the building, and appear to have been doing so for quite a long time. I've attached a bunch of photos. I haven't seen anything quite like it. My initial thought is to put an angle...
Hey folks, I've been asked to design a bridge structure that will carry some piping across a parking lot, a span of 70 feet. The client was thinking a suspension bridge might make the most sense, given the long span, but we're only talking about a load of 2.9 pounds per lineal foot, and the pipe...
Thanks so much, Joel. I was able to figure it out with the software.
Dik, thanks for your questions. I designed it as a flexure element. The flat of the angle will be welded to the plate.
Hello all. I've been asked to design a steel plate to support a 12'0" tall water tank with a 10'0" diameter. The framing has already been designed by others, but the tank manufacturer has said we need to put a plate under it. There is a 6x6 angle down the center of the frame (very rough sketch...
Apparently only one photo uploaded; here's another one.https://files.engineering.com/getfile.aspx?folder=0399a5e7-6708-4859-a4ef-1009009e6222&file=193226427_319660049698930_8304357573105270891_n.jpg
I was just called out to inspect some fresh spalling in a Spancrete panel at a car dealer/service shop. The photos show the bottom half of an 8" panel that has 2" of concrete poured overtop. We had a brief but intense rainstorm here yesterday, and it's not clear whether the spalling happened at...
Thanks again, guys. The exception still doesn't apply because the projection is going to be flashed directly into the existing roof.
The only roof plan I have is the sketch I attached with my initial post. The units are denoted by X's.
Thanks, Dik and Curveb. I have 7-10, not 7-16, but I'm guessing you're referring to the provision that you can neglect drift if it's less than 15 feet? Both sides are longer than that. And unfortunately, they have to be where they are.
I'll go ahead and add the loads together. I appreciate the...
I'm designing a pair of doghouses in an existing building to accommodate machines that are taller than the existing roof. They're close enough together that the snow drift loads (as they would be if not for the other doghouse) intersect. I've attached a rough sketch showing the drift loads only...
The company manufactures perlite and vermiculite. Perlite is extremely light, so I'm looking at it as if it's all vermiculite. Making some conservative assumptions, I came up with 15". Obviously it's not a final design, but I've got a pretty good handle on it now. Thanks to both of you for your...
I've been asked for to give a preliminary size (for bidding purposes) of 12' tall poured walls for a manufacturing company. They're going to be storing heavy materials in each area of the building, and loading and unloading them with bulldozers. The attached sketch shows the anticipated weight...
