Rothoblaas Catalogue 2019

TECHNIQUES FOR WORK AT HEIGHT

TECHNIQUES FOR WORK AT HEIGHT

WORK WITH RESTRAINT

AVOID FALL-RELATED RISKS Work with restraint involve a system that limits worker movement to prevent them reaching areas in which a fall from height could occur. This system does not arrest a fall from height, but instead prevents the fall. This system is generally preferable com pared to working with a fall protection system. Nonetheless, it cannot be used in cases where the worker must be sus pended.

L max

ROPE + HARNESS Rope is proper length

ROPE + HARNESS Rope is wrong length

FALL PROTECTION

LC

PREVENTING FALL-RELATED RISKS The fall arrest system has the purpose of: • reducing the distance required to ar rest a fall • absorbing the energy of the fall to limit the arresting force transmitted to the human body • keeping the injured in an appropriate position to limit the effects of inert suspension With the help of this system, the worker can carry out their work, accessing areas or positions that could potentially cause a free fall, and if a fall occurs, the system limits the length of the fall by arresting it. For this reason, a fall arrest system must include an energy absorption device ca pable of containing the forces released by the fall to levels that can be supported by the human body. Before using this system, it is important to consider the fall factor concepts and air draught concepts.

TA

L

max

HA

D

sic

If a fall arrest system is installed, which involves the installation of UNI EN 795 type A devices and a worker provided with PPE complete with an energy absorber, the following calculation must be made to obtain the air draught value:

TA = LC + L MAX + HA + D sic (+ f)

[m]

where:

TA LC

air draught

length of the rope from the fixed anchoring point to the roof to the anchoring point of the harness at the moment the rope begins to stop the fall maximum extension of the energy absorber (maximum 1,75 m) 1,50 m, maximum height with respect to the worker's feet when upright, measured from the connection of the rope to the harness

L max

HA

D SIC safety distance (minimum 1 m) f

any strain generated by the fall on the type C anchor line

FALL PROTECTION SYSTEMS | TECHNIQUES FOR WORK AT HEIGHT | 13