Pump jack scaffolding details

I was pretty interested in pump jack that was used in the residential construction site. It was safe and easy to use in small construction site. A plank is simply raised by using workers' foot to pump the jack. Here is the detailed description from a website. It is mostly composed of aluminum poles, pump jacks, wall braces, and work benches.

-Maximum Capacity : 500 lbs
-Maximum height : Wood poles: 30' height
                             Metal poles: 50' height.
From <http://www.wernerladder.com/catalog/files/rc154.pdf>

 

Residential Construction Site - Cladding _10/22/2010

Siding Installation using pump jack

1)They mark on the walls to make sure every siding is plumb.

(Trying to make sure the line is plumb-  The line is already on the long stick, so he simply plots dots on the walls)

2) After they are done with  marking on the wall, the draw a line using a string.

3) Then, they install the sidings using air compressor nail guns.