I'm engineering a deck that is designed independent of the building with cables in the "X" formation designed as tension only cables for the lateral system. The cables are attached to plates that are bolted to wood posts and wood beams. I designed the lateral system with an R of 1.5. Table...
Thanks everyone. I have expressed these concerns to the client and hope he'll reconsider hiring this guy. I've requested hard data to confirm. He has not submitted any reports yet but I'll make sure to review them.
I have a client that drove about 50 10" diameter piles along their water front property and now want to build a two story boathouse on it. They were driven 6-8' into the soil with a 4500lb drop hammer. They stick above the soil about 15 feet, than there is a dock and above the dock is a two...
We have a 12" thick wood framed wall which structurally only needs to be a 2x6 wall but due to desired insulation values the architect is wanting them as 12 inches thick. The contractor does not want to pour a 12" thick concrete wall, rather he wants to do an 8" ICF wall with 2" of insulation...
The contractor says he'll save over $200,000 by doing it this way but I don't see it. Either way I agree with the comments and appreciate the responses.
For some thermal break issues the contractor wants to install a 1" thick layer of insulation on top of metal purlins and than screw down the 1.5" 20g metal deck on top of the insulation. This is for a large tilt up concrete building with steel girders every 20' and metal purlins spanning the...
I am looking for some assistance on slab / foundation joints for use in a water tank.
The tank wall has 12” cast-in-place concrete walls with an ID of 30’. I currently show a thickened continuous ftg that is 6’-6” wide x 1’-0” thk transitioning at a 3H to 1 V slope to a 6” slab (all poured at...
Mike: the geotech did consider uplift and I agree that 6" may not suffice, we will recommend more, in fact we have to have something there else the soil around will just cave in so 12" of some compressible material should work.
haynewp: I just joined this project and I think it was the...
The quick question: when do cracks in a cmu wall become a structural concern? Most posts I viewed deal with the cause of the cracks. Once that cause has been determined and fixed than when is the building structurally in jeopardy? I'm not thinking about minor shrinkage cracks but larger...
I would install them especially if the building is tall, imagine snow falling 20' before hitting a child. They would also help you in a legal case because at least you did something to prevent injury. They do work too - I live in a snowy area and they do work, if the building is heated than...
The lack of information does make it difficult to properly understand as well as Engineer anything. I don't have and won't have any idea where they might place this connection so I'm going to have to find the worst case condition and assume. It is actually a double CMU wall so two 8 inch walls...
I've searched many previous threads on this subject but unable to find a solution. I want to put a bolt through a CMU wall (a grouted and an ungrouted case) and a plate and nut on the outside face. It is to hold a cable that will be in tension. Does anyone know how to put a capacity to this...
I should've had more restraint and not allowed the contractor to change the original design from separate footings to monolithic. Hind sight is 20-20. by the way, the PEMB calcs have zero thrust on those footings - all the thrust was designed to go to the exterior columns. Even though during...
Yes the first cracks appeared two months or so before the roof. I measured the CJ and they were 1.5" deep, plans called out d/4 (5" slab). There was no fiber or mesh, rather #4 @ 18" ocew continuous through the CJ's. I've never seen slabs that stop the reinforcement from going through a...
The contractor said that they were cut "very quickly" after they poured, that was my first question to him. The plans state within 10 hours of placement. I have no way of verifing this time though.
I would typically expect the cracks to occur at the thinnest section, with a 8' square footing...
That was my first thought too, in fact the original design had the footing poured first than the slab poured on top with a diamond shaped control joint so that the control joints lined up with one another. The contractor requested the monolithic pour so I accommodated him and since it was a...
I inspected a PEMB that had large (8'x8'x2') footings at each column. Columns were spaced 25' apart on gridlines that are 50' apart. The contractor poured the footings monolithically with the 5" slab on grade (#4 @18" ocew). Control joints were 15' square grids. I'm told that cracks began...
Mike - these guys are actually steel fabricators and welding time is essentially free to them as opposed to ordering more steel.
rb1957 - the channels are 3/16" thick, 12" tall, and 4" flanges - its a custom shape and the material is unknown so I assume A36 for now. I modeled it in RISA and...
I have a client who has a 9' long channel and needs it to be 12'. It will act as a beam with a uniform load and be pinned on each end. For now he plans on welding a splice plate to connect the two channels (a 3' piece and a 9' piece) on one side of the web and on the top of the top flange and...
I have a large underground concrete tank that is designed to be water tight. The water table could be above the lid resulting in extremely high bouyancy forces. To help get an idea the tank has about 3,000 ft^3 of volume - I would need a 7' thick x 20' x 12' concrete deadman to anchor it too...
