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I thought the only way that you can consider like a 3 sided open structure is if you have a rigid diaphragm????

I am having a hard time understanding how to design a freestanding masonry elevator or stair shaft. I am looking at like 40 foot tall shaft that is going to access the ground floor and two elevated floors. After reading the code it makes it clear if I don't want lateral loads from the building...

I just got email back from a precast manufacturer here in Buffalo NY. He gave me a load table from 1971 but it looks like it is a double tee setup, is this typical or would they have single tees that space at 8 feet o.c.???? Arch is just looking for a quick ya or na about putting these roof top...

I am working on a building from 1966 that has roof framing that consists of 30" Precast Concrete Tees @ 8'-0" o.c. that is spanning approximately 68 feet. Does anyone know where I can get some information on the capacity of these tees? Any rules of thumb for being able to make cuts in existing...

No the system doesnt appear to look like that at all. There are square drop panels at these columns. njlutzwe (Structural)1 Jul 15 13:19 Rweave, Any chance this was a C.A.P. Turner system? http://www.mbjeng.com/wp-content/uploads/2011/03/N... There are several antiquated two-way systems...

The building was built in 1927 and it is located in New York. KootK (Structural)1 Jul 15 13:41 Age and location of the building would be very useful parameters here.

Trenno that was my thought initally was just look at the slab and system at the 45 degree angle. But when I was searching online I was finding some old articles about a "4 Way" slab system. They started taking like the sin of the angle of all the reinforcing and converting it to an equivalent...

The reinforcing is not radial and they def have column strip reinforcing at columns at the 45 degree angles. KootK (Structural)1 Jul 15 04:32 Any chance the rebar might be radial, like this: Link? I like to debate structural engineering theory -- a lot. If I challenge you on something, know...

Has anyone come across a 2 way concrete slab system with drop panels at the columns but the reinforcing of the concrete slab is 45 degrees from the axis of the column grid and not the typical perpendicular direction? We are going to be renovating the entire existing building. They want to change...

Thank you everyone for the quick replies. There currently is supplemental angle framing that is picking up the edge of openings that they want to just leave in place. So my only concern really was the bearing on that existing poured gyp deck. WannabeSE thank you for the pdf for the gyp deck I...

I am working on this building from around 1960 and it has an existing poured gypcrete roof deck system that spans to bulb tees that span to the steel structure. The client wants to close a bunch of existing roof penerations that had existing duck work with a steel plate bearing on the existing...

I am working on a wood stud wall with structural I plywood on one face as a perforated shear wall to resist lateral loads. The equation for perforated shear wall capacity is Vwall = (v Co)*(Sum of total lengths of wall segments). My question is for the "v" in the above equation (intial shear...

Thank you JAE and CONCRETEMASONRY for your replies. I will keep this information for the future for sure. It just so happened for this project after revealing the adjacent windows masonry above the lintels there seems to not be consistant running bonds. There was some misc infill brick and...

Concretemasonry - I am replacing the existing lintels with new lintels for sure, that is not the situation. The situation is trying to come up with a solution to shore up the existing structural brick Masonry. That is what I was asking about using the Deep Beam anaylsis to count on the Brick to...

I am working on this building where they exposed the existing steel lintels that is supporting 12" wide unreinforced brick masonry x 4' high x 6' span opening. The existing steel lintels need to be replaced, so I am working on trying to come up with a plan to support the brick above the window...

I have done some work on the McDonald projects in the passed and the little time I have worked on them I have not once ran into a pre engineered McDonald building. The play place buildings are not a popular building type anymore. But the ones I have ran into were just Steel roof joists with...