Do you have a sketch of these? Struggling to picture them in my head.
Regarding using washer plates on each anchor (i.e. not one large plate like OP sketched), would that really create a plane of weakness assuming the washers aren't very close to one another nor particularly large (in plan)? I...
OP, have you designed the reinforcement in the column that will transfer the forces to the footing? If so, then you know how to determine the required dowel area! Make sure to take care in detailing that connection, looking for details such as maximum steel in the column and development...
Thanks for the reply, and this is correct, they're not high-strength bolts. Anything against loctite blue? I ask because the supported elements will likely have to be replaced in 25-30 years and I've heard loctite red can be a beast. Access to these elements requires a crane as well, so any...
phamENG - thanks for the response. Question was more about general practice, but to be a bit more specific about my case (without divulging too many details for legal reasons): it's a 1/4"-20 t-bolt, sees dynamic loading (think rattling due to wind), service life of the supported element is...
Been doing some research on bolt loosening for a job I'm on and while it seems like there are tons of options, I'm curious to know what your preferred method is. Doing some searching in this forum has yielded varying opinions, with some of the most popular including defacing the threads above...
I am looking for resources on the basics of evaluating existing structures. I realized that while I've spent my two years out of grad school doing (very valuable) design and CA work, I'm not confident that I could perform an adequate assessment of an existing structure if needed. I certainly...
@KootK: Those are some great points. Indeed, not at a drag strut, and because it's at a splice location, there could be the argument that there are more bars there than needed. I do have chord reinforcement at the other side as well, I was thinking that could be a get out of jail card as you...
I have a 3" NWC on 3" metal deck with #8 @ 12" chord reinforcing and unfortunately will need some small 6" diameter penetrations that will cut through some of those bars. Has anyone encountered this and what could be a solution to reinforce the chords? In the past, I have just added trim angles...
Not sure, but in one of the photos on the engineer's site it looks like they're embedding a steel post inside the concrete column immediately above the steel truss level, so the thickness may be lower than that above...I'm not convinced, but just an idea!
Looking at ACI 318-14 Table 11.5.4.6, detailed method for calculating Vc for shear walls, there is an instance where, due to high tension in a wall, Vc turns *negative*. The commentary for this section (R11.5.4.6) even states that equation (d) (3.3*sqrt(f'c)*h*d + Nu*d/4lw), which is the...
I should have mentioned: we have load tested HILTI epoxy anchors to 500 lb, so knowing this we may just tell them to limit the load at each anchor to 500#/safety factor (4?).
Hi all,
A contractor for a reno job I'm working on wants to hang ductwork by chipping away at an existing slab and hooking the ductwork off existing rebar. Has anyone encountered something like this before and have watch-it's/opinions? The ductwork is very light, to note. I told him I'd look...
The connection has to transfer the full beam end moment to the column, assuming there isn't a beam opposite the one in question that could take some of that moment.
