Metal deck to steel beam weld
Metal deck to steel beam weld
(OP)
The HVAC curb was roofed in before the puddle welds from the deck to the new steel framing was performed.
Is there a way to complete this connection from below the deck?
It is in a region of low wind and seismicity.
Thanks!
Is there a way to complete this connection from below the deck?
It is in a region of low wind and seismicity.
Thanks!






RE: Metal deck to steel beam weld
Maybe screws, but then the screw points would be penetrating into the roofing material, an eventual leak.
Offhand, I would say no. Contractor's omission - rip and replace here...
Mike McCann
MMC Engineering
RE: Metal deck to steel beam weld
In any event, take off the roof and attach from above as required. Trying to screw from the underside of the deck will be difficult and almost impossible to inspect to see if they got everything right or not. You also have to remember that your beams are relying on the deck diaphragm to provide lateral torsional buckling resistance. W/o proper attachment your beams may not work.
RE: Metal deck to steel beam weld
Where the deck is parallel to the beam, have them add a flat plate from the edge of the beam flange and reach over to the next low flute. Provide a butt weld to the beam flange, and fillet weld to the deck.
Wouldn't that lock the deck down to the beams and transfer the diaphragm shear to the beam as well as provide your top flange bracing?
Note: The deck is still somewhat bracing the top beam flange since friction from the deck bearing on the beam is providing some resistance. But we like to ignore friction in the event of vertical seismic loading, but you did mention low seismicity.
There should be a retrofit here that doesn't require tearing things out in this case..is my thought.
RE: Metal deck to steel beam weld
RE: Metal deck to steel beam weld
RE: Metal deck to steel beam weld
Also, make sure they don't puncture the membrane by drilling too far.
RE: Metal deck to steel beam weld
Appreciate the fire caution and the compression flange reminder.
RE: Metal deck to steel beam weld
I appreciate the moral support, the cautions, and especially the clever alternatives which I'll keep in my back pocket for 'the next time'.