Hi, I am designing a small moment frame. Each steel column in the moment frame will be on separate drilled piers. Does the drilled piers need to be connected to one another via a horizontal tie? I recall reading somewhere that it should be connected by a grade beam or similar structure but I...
Hi, I am trying to design the foundation for a vehicle barrier. The barrier specs is that it can resist a 15,000 lb truck going 50 mph. I know ASCE specifies 6000 lbs for passenger car barriers but I doubt that is sufficient in this case. I looked at AASHTO and I couldn't find a number either...
Would it be fair to say that if the supporting structure (in this case the frame) is really rigid, then z/h=0? If the equipment is going on a really low concrete pedestal, I can't imagine justifying z/h=1.
Thanks,
Hello all, I have an industrial equipment anchored on top of a framed structure that is 4 to 5 feet above the ground. Would this make the z/h=1 for the anchorage of the equipment to the frame? Hypothetically speaking, what if this industrial equipment is anchored on top of a framed structure...
Hello everyone, thanks for the responses. I was able to back calculate the CS that the piper gave me and it seems to be based on an R of 12 for nonstructural component and z/h=1. I calculated the CS of the pipe rack lateral system assuming an R of 3.5 which gives a similar CS to the...
Hello all, the engineering firm I work for has a structural and piping department and we design pipe racks. The piping department gave me really low seismic forces at the directional anchors. I did a quick hand calculation taking the tributary weight for the pipe for each directional anchor and...
Hello all, I am a junior engineer and I am wondering if anyone can answer the following question. From my understanding, we use the polar moment of inertia when find the torsion stress in welds but we use the torsion constant when finding the torsion stress in members. Is this correct? If it is...
