I ordered a fixture and mounting bracket from Graybar this week. An AEL 115 MH fixture with drop glass lens as well as a Lithonia mounting bracket. Interestingly, the bracket cost nearly twice as much as the fixture itself. This will also be my first MH fixture I've ever owned.
Whoa that is an expensive arm,I thought the cost of a 24" Thomas & Betts tapered elliptical arm at $120.00 was bad enough.I'm going to start bending/welding up my own arms.
And it's only 24" long!!!! I think an aluminum arm would be cheaper though. That's probably why they're used here. I found a much cheaper mast arm here but that's still a big chunk of dough. Very rarely to mast arms pop up on ebay at reasonable prices. I want a real mast arm so I can mount one of my lights (probably my OV-10) to a 4X4 wood "pole" but the $10 yardblaster arm is a lot easier on the budget than a $100 mast arm. The only real difference is the mounting plate for the thru-bolt. I wonder if a custom thru-bolt plate could be welded onto a yardblaster arm...
Hmm, I've always though steel arms would be cheaper than aluminium arms but I guess not. xD I would think that truss arms, braced S shaped, and double guy arms are probably the expensive though.
I guess it depends on the manufacturer. I always thought aluminum would be cheaper since it's not as strong as steel. Galvanized steel is the only way to go for steel mast arms IMO since they won't rust and they're much stronger than aluminum, but aluminum arms are easier to install since they weigh less. I'd guess galvanized mast arms are more than plain steel mast arms or aluminum. I think tapered elliptical arms should join the list of most expensive mast arms too.
It's the same metal. It's the fact that the yardblaster arms lack a thru-bolt. Normally with a mast arm, the thru-bolt gets the full load while the lags simply keep the arm in place. With a yardblaster arm however, the lag bolts get all the weight of the fixture and thats what makes them sag. If you look carelfully, you'll see the yardblaster arm itself is very strong. It's the fact that little lag bolts instead of a proper thru-bolt are trying to hold up the fixture. The lags ususally end up pulling out of the wood (or other surface) that they're screwed into.
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I found a much cheaper mast arm here but that's still a big chunk of dough. Very rarely to mast arms pop up on ebay at reasonable prices. I want a real mast arm so I can mount one of my lights (probably my OV-10) to a 4X4 wood "pole" but the $10 yardblaster arm is a lot easier on the budget than a $100 mast arm. The only real difference is the mounting plate for the thru-bolt. I wonder if a custom thru-bolt plate could be welded onto a yardblaster arm...