I just have a few thoughts:
1. Its very unlikely the penthouse, even if unaccounted for (which isn’t likely, as a recent interview indicated it was accounted for), to cause a failure. I agree with XR250 that the majority of the floors were likely no where near their design loads.
2. The...
If you watch the beginning over and over, it looks like the top two slabs deflect a column line or two in from the edge. The edge of the top slab rotates and is pulled back. Looks like those slabs failed in flexure first.
That one crane in the background tilts forward as if it was resting load...
SDI came through and sent me the Bowman catalog from 1985. I've attached it in case any future person who comes across this thread needs the same information. Also, based on a site visit, it looks like the contractor installed the 1-1/2" not the 212. Go...
https://d-macindustries.com/ask-d-mac/my-drawings-show-type-ir-deck-what-is-that/
So apparently theres 212 V-grip and 312 V-grip. I found it listed in some UL assemblies:
http://isolatek.com/ul-design-thickness/2019/Dry%20Mix/D859.pdf
http://www.metaldek.com/downloads/ul/P920.pdf
It may have...
I'm not sure. The catalog in the link is from 1973 and has a "Type V" composite deck. That's all I could find. It's not a big deal as I can conservatively calculate the capacity, but it would have been great to be able to identify the deck. Thanks for you help.
See the attached pdf. The concrete slab rests on a "2/2 V Grip Deck". V grip deck seems to be Inryco (https://www.eng-tips.com/viewthread.cfm?qid=361447), but I have no idea what the "2/2" means. Anyone have any idea about this nomenclature...
Tapcons are coated in Climaseal which is a thermoset polyester. Just regular steel underneath. It is recommended to use hot-dip galvanized, stainless, copper, or bronze with pressure treated fasteners.
I personally have no experience with tapcons in conjunction with PT wood. But i’d have to...
I love it.
First I'd find out how old the building is. Then I'd measure exact flange sizes, this should give you a good idea of when it was manufactured too. Then I'd call local distributors to see what manufacturer they may have stocked around that time. Kind of weird there's no stamp though...
In Pennsylvania, agriculture buildings are exempt from the Uniform Construction Code. Pennsylvania has a state-wide building code, local codes only cover zoning. Farmers also really put up a stink about permitting too and claim "farmer's rights". They pretty much do whatever they want and the...
The flange does buckle. You use a reduced, or effective, flange width based upon whether the flange is stiffened at both ends (by the web and a lip) or just on one end (by the web). In the first case, your effective flange width is much greater since it is stiffened at both ends. But, you must...
Rb, I'm going to have to disagree with you interpretation. The first sentence of specification section C3.1.4 clearly states "The provisions of this section shall apply to I-, Z-, C_, and other open cross-section members that employ compression flanges with edge stiffeners, with exception of...
Mike, lips are the little ~ 3/4" long pieces that are parallel to the web but on the opposite side of the flange.
Tramyer - The commentary for C3.1.4 in 2007 states "Distortional buckling is an instability that may occur in members with edge stiffened flanges..."
Therefore, it is not something...
Your diagram induces shear not tension. Thats a different situation than the uplift scenario in the sdpws. Unless we’re missing some other bit of info.
