I have taken many photos of these lifts because they are now heavily used in construction. You seldom see a ladder anymore. In fact, I've taken so many, where do you begin? The following has motivated me to try to find some of them in my photo folders.
Wichita firefighters rescue man stuck in boom lift
[The worker was 120' in the air, and he was not hurt. There is no information as to how/why he was stuck.
Bartlett Grain Co LP]
|Dennis DeBruler posted|
While walking to downtown Downers Grove to check up on the construction projects I had been following, I noticed a large worker-lift being used for the outside maintenance of a residential unit.
The "chains" that guide the hydraulic hoses show that both booms are extended most, but not all, of their potential length.
|Cropped from above|
|Cropped from above|
The lower boom can extend to 60'6" (up and over height), the maximum platform height is 125', and the radius (horizontal outreach) is 63'2". [specs, click "Reach Specifications"] Drive speed is 3.25 mph. [brochure]
[Note that the first photo shows it has various steering modes because it is in a "crab steer" mode. It can crab up to 45-degrees.]
|The maintenance work was using the platform capacity to carry just one worker, but a lot of supplies and equipment.|
|specs, click Reach tab|
The axles can be extended from 8' to 12'. I don't know what the up/down arrows indicate.
I also don't know what these arrows are for because, according to the specs, the wheelbase is fixed at 12'6".
This shows how the degrees of freedom for positioning the platform can be used to fold the unit into a compact configuration for transport.
The rest of the trip down.
JLG 800AJ: 500 lbs up 80' or 51'10" out with an up-and-over height of 32'.
Then he lowers the upper boom so that the platform is on the ground.
You can see the supplies staged by the fence.
He didn't get out of the platform. There was a helper to fetch what he needed. But in this video, I don't see what was added to the platform.
As I go back to my car, the lift has started another trip down and the crane is moving supplies to the roof of another building.
This is one of the two lifts that were used by the erectors of an underground, three-story, precast-concrete parking garage for an apartment building.
500 lbs at 46' up or 31'8" out
The first lift had already been removed from the site. I caught them setting their last slabs because they used the remaining lift to walk their equipment, such as ladders, up the dirt ramp...
|Zoomed in on the above photo|