Wrong sized curb adapter.... Need to salvage this job ... Help
Any advice or expertise is greatly appreciated; I have found myself in a bad situation and am trying to minimize the damage as much as possible. I had sold the bid to change out a 10 ton RTU that was located dead center into the building complex, I accurately figured the cost of the job with the appropriate sized crane, labor, materials, delivery and materials... however one of our technicians had been sent out to field verify the supply and return of the original curb... as it was presently a Trane rtu installed onto a curb an adapter attached to the building curb. He had the curb adapter spec sheet and submittal and verified that it would work, and well he failed to accurately measure so now were stuck with a curb adapter we can’t use and having to re-order a new curb. The Crane is just too expensive to send back out to the job due to the 6 hour minimum and at the hourly rate for that size of a crane and I need to avoid this option if at all possible. Currently we have the old unit removed, and the new unit set out 4x8''s I now need to figure out a away with minimum equipment and man power to move the new unit approx. 20'' over and lift it about 26 '' and place it onto the curb adapter ( PLEASE REFER TO ATTACHMENT / PHOTO ).
So what I am asking is anyone previous experience on what to do when the curb adapter is unfortunate ordered wrong and you have minimum man power in the area ( 3 guys max maybe 4 ) and you are attempting to avoid having a crane come back out for an additional 2,000$. I have been looking through sun-belts rental catalog and have found a high lift pallet jack that may work but I am unfamiliar with their operation as in if there is some mechanism they may assist in rolling or pushing the unit forward and if it would be able to support the 800 lbs the RTU weighs, other options may be using low profile jacks or bottle jacks or something of that nature to get it into place?
Let me know what you think my options are and what you would do in this situation.
Do you guys own a Gantry or can you rent one? A gantry will get when you need done..
The company I work for owns an aluminum gantry and it can be lifted to a roof by 2 guys when its in pieces.
Here is a link to a gantry, if you dont know what one is.
Is the new curb light enough to lift to the roof without a crane?
Getting a pallet jack on the roof would be harder than moving that unit.
Last time I had to move one across a roof to a new location and was down to a 2 man crew, I borrowed a couple of my neighbors (friends) for the 15 mins it took in total and paid them in beer later that night lol.
Pick up some lengths of 1" black pipe as handles and slip it under the unit, 4 strong guys can carry it over that short distance with ease. If not, you need better friends cuz mine are mainly desk jockeys and not in tip top shape lol.
We had to do that also, we had a rtu in the center of a shopping mall, 4 guys some pipe and short straps so you don't have to bend so far. Worked great
Originally Posted by Eddie1KRR
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4 guys and acouple of straps will get it set just fine
Can you post a pic of the old curb on the roof
there you go,
You should buy the reg curb that goes with the new unit and just cut it in. You can get a roofer (I do it myself) to seal in the new curb for under 600. Cutting in a curb is so easy. Or... as long as the perimeter of the new unit fits on the the curb, you can go get some 16ga metal cut and re-do just the inside of the existing curb. Get a new crane company......the company you have may be taking advantage of you.
B**** cranes was priced at the most reasonable rate in the area (4 hour work minimum 2 hours for the travel to job to portal) no additional fees. our regular crane service we use did not have the machinery with the lift and reach necessary 153 ft out + 20 feet away from the building.
Originally Posted by energy star
I can not locate a place to rent a gantry crane or locate one locally in stock at this time, My option is looking like utilzing 4-5 guys a commerical hand truck to lift the rear of the unit to allow it to roll and pipe through the rails of the unit for leverage to push the unit than utilizing a hydrualic floor jack to get the unit onto the curb adapter we will also bring a duct/material lift along for what ever reason.
materials list are looking like
-hydrualic floor jack
-2 hand trucks
-and pipe / something to roll the equipment onto and jack the unit up to remove the pipe used to roll the equipment
- and new curb
Gantry with pneumatic tires is 2nd best option from safety stand point, crane being first. 4 motivated men with straps will work as well. The tech that measured wrong gets the comp section.
we may look into purchasing one in the near future, as i've seen the videos and think that this equipment could be very benificial. Any recommendations on the type to buy... I see they are made of aluminum or steel.
800 pounds is really not that much, most of your weight will be on the compressor and control side of the unit so plan on that. But man power with the pipes and proper dunnage will get the job done. Everyone here is on the right path....we purchased those forearm lifting straps, they look like they would never work, but greatest invention ever when it comes to personal lifting of stuff. Two sets of those on either end to get the extra height lift onto the curb and a set of guys on either side and you got this job done.
In the future, if your looking at doing many more of these types of lifts and work. May want to look into the http://pro-lift.com/ We are looking into this with a certain mall acount we have brought on. Much cheaper to basic crane just drop the units on the roof and then wheel the units deeper where they need to go, instead of the steep cost of a large crane with gantry, etc. A basic 30ton boom truck is about $150 an hour here, where as a 275 ton crane with the accompanying flatbed of weights, set-up time, gantry, etc can cost about 2500 to 3500 for half a days work....so if we can wheel and set the units...then we already payed off this system from Pro-Lift with two major crane lifts.
The Pro-Lift looks great and all, but owner is talking with manufacturer about the real world with gas piping, electrical, etc that one must get around. So once I know what we think and learn, will pass it on to the community.
You need to set two 4x4's on the new adapter curb. Then you need two 1''-1 1/4'' dia solid bars and slide the bar through the holes in the base of the new unit. Then get 4-5 guys that can pick up 200 each, and grab the bar that extends out each side of the new unit at-least 24'' and pick it up and set it on the new curb. Then get those same guys to pick up ONE end of the new unit thats on the new curb and SLIDE out the 4x4. Do this on the other side and you're done. I have set so many units, I lost count.