Platfor for moving HVAC Unit

[Azmarya]

Hey guys

I'm working on a project where they will be lifting an HVAC unit and moving it into the building through a louver. The roof is not flat - we need to design a platform to take the load from the unit/workers. Attached are pdf sketches showing what will be done. Will what we have in mind be stable enough? Nothing has been designed, just the concept. So beams will be spanning/resting on the louver opening and on the stair tower (not built yet). Beams will be secured using c-clamps on both sides. Over the beams will be OSHA planks.

I appreciate any input!

 

[Azmarya]

Second attachment

 

[Azmarya]

Any advice? We will be using W5x16 beams

 

[oldestguy]

Assume the numbers are right. Any risk of the support "joists" being unstable and twist with resulting beams laying flat? Criss cross bracing between them at ends and center??

How well is that roof attached to structure?

I'd look at hiring a crane suitable of taking it from the truck and be done with it.

A big fork lift also.

Assume insurance is all set???? Slip on slanted roof and OOPS??

What about a local mover doing this and its all his risk.

 

[oldestguy]

Another thought. Are there any Amish within say 30 miles? Might even go farther. They do an amazing job of jobs like this. They might hire a crane, if mandatory. They are self insured and you won't get sued.

 

[r13]

Watch out the lateral stability of the system. Make sure the support towers stand still, and you might needs a few braces to stiffen the beams. You should consider use steel pipes to roll the unit onto place.

 

[oldestguy]

Your words:
Beams will be secured using c-clamps on both sides. Over the beams will be OSHA planks.

Tells me you have not done these sort of things before. Looks like an amateur job.

No C clamps. You drill holes and mount all with bolts. Maybe even do some welding.

My saying for many different jobs I have been involved with.

IF IT CAN BE DONE WRONG, IT WILL Make it simple and avoid problems.

ALLOW FOR UNEVEN LOADING, SUCH AS CAN ONE BEAM TAKE ALL THE LOAD?

 

[oldestguy]

Just what is a "stair tower"? Something permanent?
You do know you can rent scaffolding and erect a "tower" with a platform on top if necessary.

They have ladder sections so you don't need stairs.

Stand this "tower" on sufficient planking so you don't have any tilt

 

[Azmarya]

The stair tower is a scaffolding stair tower - so it will be a stable support.

We'll be using 7/8" plywood sheathing over the beams. (2) beams will run along the scaffold platform and will be attached to the scaffold using clamps. The beams running over the roof will be bolted to these beams on the scaffold.

Thanks for all the advice/tips!