Hi KootK, I received more photos and unfortunately it looks like the tie joist is fully welded to the clip angle, so there would be no slip at this joint. I'm 99% sure I can remove this rod but I don't know for sure...
Hello,
I'm wondering if anyone familiar with OWSJ's from the 60's can comment on this (see attached photo). The tie joists at a building we're working on all have a vertical rod from the bottom chord tie to the top chord. Ideally we could remove this rod but there is some debate as to its...
Hello, I'm designing a concrete base slab to be used for a lime silo and I started wondering about the effect of crushed lime sitting directly on the concrete surface. The reason I'm considering this is since lime can be used as an additive prior to curing, but I was wondering if there would be...
In my case it must be buried under or within the concrete. There is an adjustable portion on the top, is there usually one on both sides? I'm not too familiar with house construction. If it was somehow buried within the concrete when it was poured, this could be an important thing to know.
@ishvaag, thank you for that link. I'm using those values as "worst case" scenarios just to get a base value.
@ToadJones, I'm not sure how the post was actually installed under the slab, can you clarify if that is what you mean?
Hello,
I have a situation in a house basement where the concrete floor slab was poured around the steel HSS teleposts (which are on piles). The floor slab is heaving slightly, and it is lifting the telepost column with it due to the bond between the slab and steel. I'm trying to find a way to...
That is correct, it is an unstable setup. It was thrown together more than 50 years ago by someone who was not an engineer, and it has been in use this whole time. The frame's purpose is to support the hoists that lift stopgates out of one area in a hydro dam. I am analyzing it as part of a...
Hi all,
I'm analyzing a steel frame structure that is used to support a crane system. The two S-sections that act as tracks for the crane trolley are two-span continuous, and are fastened with bolts to the top of the columns. This is the only type of support given to them (top flange is...
BA, I believe you are correct where you recieve 615# of tension. That is what I have in my calcs as well, however I'm still uncertain as to whether that properly accounts for the initial prestress required for the unloaded condition. Hypothetical, say the initial sag is desired to be 0.1ft...
rb,
The cable is only about 35lb (0.065lb/ft, 2 times cable length as there are two of them). By my calculations, (using trigonometry and (TL/AE)=deflection, then iterating until a result is found) the additional point load increases the sag from 2ft to 4ft, thereby having a significant...
Thanks for the responses,
hokie66, what I meant by "relatively small load" is that it is less than the weight of the wire required, as opposed to a lifeline system where the concentrated load is two orders higher.
The method BA mentioned is in the transmission line design manual, however it...
Hi all,
I've got a situation where there is a 262ft span of 5mm steel cable with a relatively small concentrated load in the center. In the unloaded condition, the cable forms a catenary shape with a maximum sag of 2ft. A load of 20lb is then applied to the center of the span, pulling it out...
