This article is designed to give you “insights” into how I rigged and performed this work so, you can attract high rise pressure washing jobs into your window cleaning business!
Rigging a high rise pressure washing job:
let me start out by showing you what the components are, and what equipment you’ll need to perform this work.
#1: the rolling roof scaffolding rig
mio corporation rolling roof scaffolding rig. this is the type of window cleaning scaffolding you’ll need to use to rig and rappel down the side of buildings. this rig is designed specifically for “bosuns chair” work which allows one worker to rappel on two ropes.
one rope is the main descending line and the other is a ‘back-up’ fall arrest line.
for pressure washing, i’ve added two 50 foot sections of pressure washing hose and spray gun to bring down the side of the building.
#2: Tie back clamp:
the tie-back clamp is a secondary safety device to secure your roof rig to the building’s roof top when ‘roof anchors’ are not present. roof anchors are 5000 pound test rated by a certified engineer; tie back clamps are the alternative when buildings are not equipped with test rated anchors.
the tie back clamp is positioned around the ‘parapet wall’ and should be close to a direct line from the ‘line of descent’.
you’ll reposition your tie back clamp as needed during the course of rigging descents.
#3: pressure washer:
Duct tape was added to the hose joints for extra safety. i had a horrible mishap when testing the length of hose needed for this job. i clicked the two 50 foot sections together and ran them over the edge of the building. as the hose was about to the ground, the two sections un-hooked from eachother.
the bottom section fell to the glass awning and then, to the ground. phew! i’m glad no one got hurt! mishaps happen… this was one of the biggest screw-ups i’ve had in the last 18 years as a window cleaning business owner. i’m sharing this story with you so, you don’t repeat the same mistake i did.
this work requires two people. one person rappels and cleans the building, while the second person feeds the pressure washer hosing down to the rappeller, maintains the pressure washer, and moves the rig horizontally across the roof top.
horizontal movement can be unsafe. (please follow these guidlines provided by the iwca/ansi i-14 window cleaning safety standards)
horizontal movement can be used by meeting these requirements.
- the transportable device is designed to be rolled under load without disassembly and reassembly
- it maintains an over turning stability of at least a 4:1 ratio
- the tie back anchorage and the safety line anchorage are independent of each other and have been specifically designed for such movement and repositioning under load
- a method is used to protect the suspension lines and life lines from abrading horizontally across the roof edge, parapet wall or other building feature
- employees moving transportable devices shall be tied off with a personal fall protection system in accordance with industry standards
If these requirements can not be met, do not use horizontal movement. along with improper rigging practices, horizontal movement has been the leading cause of window cleaning accidents.