high mast lighting / sq footing / cut rebar
high mast lighting / sq footing / cut rebar
(OP)
Am doing the special inspection work on new high school football stadium. The high mast lighting was originally to be placed in deep augured holes but due to encountering rock several were redesigned and are to placed on spread footings.
The footings have # 5 @ 18" EW top and depending on the size of footings a specified number #6 EW bottom. The drawing appears to show the pre-cast concrete mast standing vertically through both mats of rebar. So the contractor simply cuts a round hole through both mats of rebar so that the mast can rest on the bearing elevation of the footing.
OK, not much weight, but depending on the number of lights lots of moment. But the # 6 bottom mat has a hole cut in it? Does that sound right?
Just want a heads-up before I ask the EOR.
The footings have # 5 @ 18" EW top and depending on the size of footings a specified number #6 EW bottom. The drawing appears to show the pre-cast concrete mast standing vertically through both mats of rebar. So the contractor simply cuts a round hole through both mats of rebar so that the mast can rest on the bearing elevation of the footing.
OK, not much weight, but depending on the number of lights lots of moment. But the # 6 bottom mat has a hole cut in it? Does that sound right?
Just want a heads-up before I ask the EOR.






RE: high mast lighting / sq footing / cut rebar
RE: high mast lighting / sq footing / cut rebar
RE: high mast lighting / sq footing / cut rebar
How is the attachment of the light pole made to the footing to develop the overturning moment capacity of the footing? Sounds like the only link to the footing from the lightpole is through shear...
Seems to me that rock bolts should be used here for better anchorage to the rockmass, in addition to the spread footing.
Mike McCann
MMC Engineering
RE: high mast lighting / sq footing / cut rebar
RE: high mast lighting / sq footing / cut rebar