New piece of equipment in the inventory. Its a pro lift hvac cart, for rolling units across a flat roof.
A customer of mine has one of these, and a couple years ago, brought it to a job. We didn't end up using it, because I could reach the HVAC unit with the crane, but I had a job come up that had units 140- 160' away on a flat roof. I've got a homemade scaffold and come a long contraption, but its only good for about 5-800lbs, these were going to be 1,400lbs.
I called that customer, asked him how he liked his, and he gave it a glowing recommendation. He said after his last $10,000 crane bill for a 210ton crane, he was doing something different, and bought one.
I decided to take a chance and ordered one. After this job, I would also recommend it, although it's a little pricey. It was $5,000 delivered to me, I think I would be a lot happier at around $2,500, but I think you're paying for a lot of liability insurance, not equipment.
Its rated at 1,500lbs. battery powered, and works really slick. There's a flat z plate you screw on each side of the unit, then pick the unit up with the end frames. The top bar is adjustable for the height of the unit, the screw jack lifts it by the bottom z plate.
We set 12 units on empty curbs in around 2-3 hours, and moved the crane once because of a parapet wall. The only worry is if you had a weak roof, you may want to put plywood down. I put plywood down just where we landed the units too switch them to the cart, but I think you could do it without on a good roof.
The job I took the pictures on, one of the lead guys told me "I've been dreading putting these units up for a month, we've had to carry and drag too many units on pipes, carts, etc. This was easy."
I'm still trying to figure out how to bill for it, I'm thinking a set rate of around $250-300 for the cart, plus the crane charge. I've got to send a extra man with it, in a pickup. If a guy had a boom truck with a deck, you could haul it pretty easy, I hauled it upright in a old manbasket in the back of a pickup. I did make a couple flat strap picking eyes for the top of them (red brackets)- why they make something to use on a roof, with no picking eyes on it, is beyond me.
http://pro-lift.com/