A concrete supplier on our project has been holding back water at the plant and not adding water on site. This obviously means that we aren’t hitting the target w/c but concrete will have higher strength. GC has stated the concrete is perfectly workable. This concrete is for spread footings and...
How do engineers create a beam end reaction table that provides a design load (LRFD) for each beam depth: W12, W14, W16, etc.?
Would like to create one of these. My firm only uses the AISC tables but I think this is conservative.
Thanks!
Would anyone be willing to tutor me on a few concepts I'm trying to improve on. I'm looking to get better at connection design, particularly braced frames and would even like to learn about buckling restrained braces.
Thanks in advance!
Hi,
Would anyone be able to help me determine the formula for the net section plastic section modulus (Znet) of a plate with holes in it as in the attached. I understand the section modulus is simply (tp* dp^2 )/4 and thought I could simply use the same formula and sub in the hole diameter...
Hi,
I'm learning simple shear connection design and I'm having trouble finding the plate vertical eccentricity. I'm following a lesson from Risa where they calculate the distance ey as 0.51. I'm not sure where this comes from and wanted to see if someone could help me find the plate vertical...
Our firm provided structural engineering services for a new two story steel framed building supported on ordinary conventional reinforced concrete spread footings and strip footings. At the first floor, the owner chose not to pour the concrete slab on grade as it's going to be retail and they...
Hi,
I'm an engineer in training and I'm trying to take a first pass at designing a column connection for a 36 inch deep by 18 inch wide by 20 ft tall wood column with a steel plate embedded in the middle of the column, bolted through on each side. The steel plate is welded to a base plate at...
Hi all,
I'm an engineer in training and was recently reviewing shop drawings for a steel framed building I designed. When reviewing the piece drawings I saw that the fabricator specified a number of bearing-type connections to have short slot holes. I don't think it's appropriate to have short...
I am reviewing a steel beam that does not have requisite capacity for my design end reactions because of the coped section. The fabricator has provided a doubler plate that is bolted onto the beam web. Does anyone know of an AISC design example that shows how this works? The closest I can find...
I’m a first year engineer trying to understand how steel moment frames are detailed. I saw this simple cabana structure which has 8 columns and steel framing running North-South and East-West(photo attached). I’m assuming it has heavy girders running the long direction(North-South) and then...
I’m an entry level engineer at a medium sized structural engineering firm with about 12 principals. Before I spend 15-20 years trying to climb the ladder to an ownership position, I would really like to know what ownership typically looks like in private structural engineering firms.
I...
Hello,
Could anyone point me to a design example for a web doubler plate for a coped beam? I have been looking online for quite a while now and can't seem to find a design example.
Alternatively if you have a hand / spreadsheet calculation that would be helpful.
Thannks!
I'm an engineer in training and designed a three story steel parking structure with normal weight concrete on metal deck. We are in seismic design category B and have a steel beam carrying parking structure loads that clashes with a diagonal brace. Instead of kinking the beam so it does not...
I need to check the capacity of an L3xL3x1/4” angle supported by (3/4”) diameter bolts embedded 3-3/4” into a concrete wall spaced 24” on center to support the edge of slab of a parking deck. The bolts are epoxied with HILTI RE 500 v3 epoxy. The angle is supporting 6’ tributary width of slab...
Hi there,
I’m interested in seeing if someone has compiled a list of aluminum structures around the world. I am looking for structures of any kind where aluminum is the primary load bearing element. An example of this is Kanazawa Station in Japan...
