Need some advice on hanging some new heaters.

[waybomb]

Had my building a year now. It's time to install a couple of new hanging heaters.
Back story... have two 300,000 btu NG heaters. One of them, I disconnected because the heat exchanged has a spilt on one of the tubes. Last winter I want planning on having heat in here, but I got the decent one running. It kept up by itself all last winter.
So I went shopping. A local plumbing supply house said two new modine heaters, 300,000 btu each would be about $3,000 each. I said I'll have to do a bit. That night, the owner called me back and asked if I'd be interested in two of 400,000 btu Modines he had in the basement. . I said I'd bring my flashlight and check them out. He closed with saying 500 bucks each.
Went there, they are brand new heaters, standing pilot in the box. If I want to go electronic ignition, they sell kits for these.
So, ya, I snatched them up. He even delivered them. The plan is set one at 50f, the other at 45f.

So here's where I need some ideas.
The current units are hung with two threaded rods each, located in the center of each side.
The new units are made for 4 hangars, 16" spacing, on each side. The beam they hang from is only 5" wide.
How would you hang the units?
See pics

 

[chowderman]

install / weld in whatever cross pieces are needed to accommodate the 4 rod design.
this is a no brainer - falling heaters will ruin your whole day.

nice deal you got!

 

[mbsieg]

Not at home to take pictures right now but what I did, took some quarter by three angle iron. Two of them with the pattern for the holes drilled in them slid them over the top of the rafter, then took a piece of 4-in wide flat steel and clamped the angle iron to the rafter. Not sure if that makes sense. I can try to draw a picture

 

[mbsieg]

Excuse my crappy free hand drawing

 

[mbsieg]

Awesome heaters by the way, I have about 10 modines between work and home. From 80,000 BTU to 500,000 BTU they just keep on playing!

 

[waybomb]

The beam is about 16" tall and the roofing is screwed directly to it.
My first thought was the same as chowderman's, but was going for some sort of non- welding solution; one of my boats is right there, with about 300 gallons of fuel in it.
I was thinking to fabricate 4 brackets, that would have two on each side connect through drilled holes through the vertical part of the beam.

 

[chowderman]

u-bolts - made for a purpose . . . use nylock nuts....

 

[mbsieg]

My bad. Looked like the perlins were attached to the top of the rafter. At least that's the way my red iron buildings are.

 

[waybomb]

Jeezuz. You are 100% correct. I wasnt there when I replied. I should have remembered reaching over all of them while painting the ceiling gray. The roof is attached to the perlins.
I like it.
No drilling or welding on the structure.

Getting old stinks, forgetting the simplest and obvious facts.

 

[waybomb]

OK, got the threaded rod, made steel brackets, going to hang one tomorrow.
The old ones were full voltage tstats.
The new units are 24v. I have to NOS Honeywell dial thermometers that go to 45f.
I'm thinking would be nice to have something like a Nest that I can check the temperature. Seems they only go down to 50f setpoint.
Anybody know of an app controlled 24v thermostat that goes down to 45f, or even 40f?
It's a warehouse and just want to keep it at 45f or so.

 

[waybomb]

One of them is up. Still need to terminate exhaust and gas supply

 

[waybomb]

One is done and making heat.
Will start on the other one next week.

 

[waybomb]

Got the other one hung today. Had to fix the brakes on the forktruck before I could get to this.

 

[bczoom]

Looks good!
Just a heads-up, someone stole your boat trailer.

 

[waybomb]

Kid is going to build a new aluminum trailer.