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Thank you all for the directions!

Hello all, I am working on a fire station job which requires to remove and rebuild elevated floor for fire engine. Anyone knows how to determine the impact load for stop, brake, etc? Any suggestions or code references are appreciated.

That was done by the previous owner, just concrete surface parging, nothing structural.

Redo this portion with steel or redo the whole building with steel? Using steel beams with epoxy bolts? It's a historical building, it has to be encased if using steel columns and beams. It will be a hotel room, 40 psf live load. thanks

It's a concrete building, old factory and abandoned for many years. Yes, rust is the problem. I think it's caused by lack of concrete cover and maintenance, and water. instead of precast, I am thinking to replace with CIP. We can add more rebar after they remove the concrete beam, leaving the...

Enable, thanks for your suggestion. We do not have much info regarding the existing reinforcing inside the concrete. The rebar has been tested. Because it's historical building, we cannot change it's size. Here is what I think, please advise if this is feasible or makes sense: 1. Remove the...

Testing was done, the strength of the concrete is about 3500 psi by testing company. The entire building needs to be repaired, and this corner needs to be replaced. I am thinking to replace the two beams on each floor and the L shape column. I am thinking the beam will be precast because of the...

Hello Greenalleycat, Sorry for the wrong angle photo. That photo shows the damage of the beam. I have attached more photos. The building is more than 100 years old. I don't have much experience on concrete building, the previous engineer worked on this repair left. The column is L shape...

Hello Everyone, I am working on a job to replace an existing beam and maybe the columns. The building is five story and the beams at this corner are in very bad shape, they are about 20ft span. There is no floor at this corner but new floor will be installed. I need suggestions on new beam to...

milkshakelake and phamENG, thanks! I am going to try to use CMU wall at the corners of the building and couple locations of the corridor to see if that works.

KootK, yes, most of front and back walls have window and door openings. That's pretty heavy for 5ft CFS shear wall. I will take a look at this CFS moment frame. The camber location is tricky, may need some kind of shim?

jayrod12, thanks for your suggestion! I can use CMU if it has to be. Most of the front and back walls have window and door openings. The elevator shaft has 2x 8ft wall in that direction and stair has 10 ft. I will check if that is enough. From my experience, that won't be enough for a 5-sotry...

XR250, thanks for your suggestions. The ARCH does not want to use CMU in the long direction. Have you done some similar jobs using cfs shear wall for cmu and plank building?

milkshakelake, this is my first project using light gauge shear walls for block and plank building. there will be a 5ft shear wall every 27ft. It will need hold downs for tension.

dik, ARCH wants to use CFS wall, so it will be strap X-bracing or CFS with sheathing, I have not checked the shear load yet.

dik, it's in seismic design category B. Stair and elevator shaft in that direction is short, they won't be enough.

Hello, We have a block and plank hotel project about 180ft x 70 ft, 5 story. It will have CMU walls as bearing and shear walls for the shorter direction. The other direction has light gauge stud wall as non- bearing walls. I am thinking to use the light gauge stud walls as shearing walls...

Thanks for all the comments!

phamENG, Thanks! That's what I thought.

See the sketch. The engineered shear wall approach does not work because of the openings and it cannot satisfy the aspect ratio. If my understanding is correct, it does not need to a shear wall. thanks,