Safety Features of Rope Suspended Platforms
Anti-Tilt Safety Lock:
If the primary rope breaks, the safety lock gets activated and arrests RSP operation through the second rope.
Centrifugal Speed Limiter:
If RSP traveling (Up or Down) speed increased beyond the rated speed, this device gets activated and stops RSP operation. This device generally activates during free fall and brake failure conditions.
Electromagnetic Brake with the manual release:
Hoist motor is provided with the electromagnetic brake as a primary holding device. Manual release mechanism shall help the cradle to be lowered to the ground level in case of power failure.
Over Hoist / Top Limit Switch:
The function of over hoist limit switch is to prevent the overrun of the cradle and hit the suspension mechanism. When the limit switch level touches the upper end, power supply to electrical motor gets stopped.
Anti-Tilting Cut off:
This is a protection system to ensure uniform loading across the platform. If the load is concentrated on one side, the platform will get tilted resulting in an unsafe condition. This device gets actuated once the platform angle is tilted more than 4 Degrees and cuts off the power supply.
This mechanism avoids the swaying of RSP in the horizontal plane. A separate wire rope (Laid from building top to ground) will pass through the sway arrestor roller fitted on the platform. This will thrust the platform to remain in the horizontal plane without swaying action. The same shall be used as Fall Arrestor or separately provided as needed.
Overload Cut-off using Load cell and display (Manual / Digital):
The function of the overload limit switch is to prevent the overloading of the cradle by alarming the operator. The load will be measured by the electronic load cell fitted on the platform. A manual or digital display of the load is also compulsory.
Overcurrent protection thro’ Relay (OLR):
This will be part of the electrical control system. If the electrical motor draws beyond the rated current due to overloading, this protection device will cut off the electrical system.
Locking arrangement for upper counterweights:
All the counterweights must be firmly placed on level ground and locked with lock & key arrangement to avoid unauthorized removal of counterweights.
Hammer weight for wire rope locking:
Operating wire rope must be firmly anchored at the ground level using a hammer weight arrangements.
Panelboard Lock & key with Emergency Push Button :
RSP Electrical panel must be locked with lock & key arrangements to avoid an unauthorized operation.
The keys to being handed over to authorized operators by identified RSP In-charge.
Hoist Guard & Motor Cover :
Increases life and safety of hoist by protecting it from dust and other building material.
Galvanised Wire rope with proper U Clamps:
Galvanised Wire rope with proper “U” clamps to be used.
Hot dip Galvanized:
Hot-dip galvanizing, as referenced on this site, is the process of dipping fabricated steel into a kettle or vat containing molten zinc. The process is inherently simple which provides a distinct advantage over other corrosion protection methods.