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Horizontal
Cable Systems
Horizontal Cable Systems are permanently installed and are
used for fall arrest and fall restraint. They safely allow
up to two workers continuous horizontal movement across spans
of 150 feet or more. Horizontal cable lifelines are ideal
for working and walking surfaces where a 42-inch guardrail
or parapet is not present. All exposed components are hot-dipped
galvanized or stainless steel. Below is an example of how
a horizontal cable may be utilized.
OSHA states the following concerning horizontal lifelines:
"Horizontal lifelines may, depending on their geometry
and angle of sag, be subjected to greater loads than the impact
load imposed by an attached component. When the angle of the
horizontal lifelines sag is less than 30 degrees, the impact
force imparted to the lifeline by an attached lanyards is
greatly amplified. For these and other reasons, the design
of the systems using horizontal lifelines must only be done
by qualified persons." (Appendix C to 1910.66 Personal
Fall Arrest System)
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Rigging Sleeves
Building designers who want to provide safe access for the maintenance worker may encounter difficulties where certain building features make various areas seem inaccessible. Rigging sleeves can provide a solution when the following features exist:
- Overhangs
- Skylights
- Rotunda ceilings
- Sloped roofs
- High parapet walls
- High penthouse walls
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Rigging sleeves are engineered to allow the maintenance worker to gain access through such building features. They accomplish this by providing a passageway through which the worker can safely feed his rigging suspension lines.
How they work...
After securing his lifeline to an independent anchor, a maintenance worker simply ties his suspension line to the steel rod on the top of the rigging sleeve, removes the rigging sleeve cap, suspends both lines through the rigging sleeve, then returns to a lower level where a platform is located to secure himself and the platform to the suspension and lifelines.
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Typical rigging sleeve application for overhands, showing suspension and lifelines safely rigged on the roof . |
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Safety lines have been fed through rigging sleeves and secured to a platform below, providing access to this area beneath an overhang. |
Advantages of Summit Anchor Co. rigging sleeves:
- Our rigging sleeves are designed with a steel cap and installed in a way to ensure the building remains watertight, despite roof penetrations.
- Our rigging sleeves are completely hot-dipped galvanized after fabrication to resist corrosion.
- Our rigging sleeves have been engineered and tested to comply with current OSHA and ANSI I.14.1 safety standards for fall arrest and suspended maintenance.
- Many installation methods are available to suit reinforced concrete or structural steel structures.
- In addition to our standard vertical design, curved, horizontal, and recessed rigging sleeves are also available to suit almost any application.
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Monorail
Monorail Systems incorporate a track that
typically runs along the façade of the building. Monorail
can be used for the following:
• Large overhangs
• Atriums
• Interior curtain wall surfaces
• Suspension of gantries
Monorail to gain access
under Overhang
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Roofcars:
Roofcars
are permanently designated to the interior or exterior of
a building. Electrically driven roof cars have controls located
inside the platform which allow the operator to perform tasks
as follows:
1. Ascend
2. Descend
3. Drive
4. Swivel
5. Tilt
A
two-person aluminum platform is tethered with cables to the
roof car boom. Typically, a roof car assembly is self contained
and does not require maintenance contractors to bring additional
suspension equipment to the roof. A roofcar may run on two
double-laid tracks on the roof or parapet that follow the
contour of the building. A roofcar may also run on four wheels
with a guiding track.
Roofcars may be equipped with long boom spans. These booms
can be designed to clear terraces or lower roofs eliminating
the need for additional suspension equipment.
Note: The IWCA/ANSI-I.14-2001 Window Cleaning Safety Standard states: “[Rope] descents shall not exceed 300 feet (91m) above grade unless the windows cannot be safely and practicably accessed by other means.” (section 5.7.12).
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