BS EN 280-2-2022 pdf free download.Mobile elevating work platforms Part 2: Additional safety requirements for load lifting appliances on the extending lifting structure and work platform
4 Safety requirements and/or protective/risk reduction measures
4.1 Fixed load‑lifting attachment
4.1.1 The load‑lifting attachment shall be secured so as to prevent unintentional loosening of the lifting accessories.
4.1.2 The load shall be suspended freely and guided by the movements of the extending structure of the MEWP. The hoist medium shall not change length while moving the extending structure.
4.2 Hoist appliance (hoists with/without jibs)
4.2.1 Power‑operated hoists shall be designed according to EN 14492‑2:2019.
4.2.2 Rope drums, rope pulleys and guides shall be designed according to EN 14492‑2:2019. Trapping and shearing points between moving parts which are within reach of persons (see EN ISO 13857:2019) on the platform or standing adjacent to the MEWP at ground level shall be avoided by providing safe clearances in accordance with EN ISO 13854:2019 or guarding.
4.2.3 The hoist lifting speed shall not exceed the work platform lifting speed by boom movement and not exceed 0,25 m/s. The hoist lowering speed shall not be more than 1,5 times of the hoist lifting speed and in no case exceed the lowering speed of the work platform.
4.2.4 Manual boom extensions shall have end stops and mechanical locks for the retracted, extended and working positions.
4.2.5 An interlock shall prevent movements of the MEWP whilst lifting or lowering the load with the lifting equipment. This interlocking device shall comply with EN 280‑1:2022, 4.11 and meet a minimum Performance Level c. This requirement does not apply for human powered hoists.
4.2.6 Means to reduce the risk of collision between the suspended load and platform occupants due to the movement of the extending structure and the platform shall be provided. Aspects to be considered include:
a) a reduced speed of the extending structure and platform;
b) platform position during the lifting, lowering and other movements of the load. It shall not be possible to position the work platform below the load attachment point. Collisions between the suspended load and structural parts of the MEWP shall be avoided.
4.2.7 The hydraulic equipment shall comply with EN 280‑1:2022, 4.9. Hydraulic hoses in the vicinity of the operators shall not pose a hazard to them (e.g. due to leakage of hot or pressurized liquids).
4.2.8 Hydraulic cylinders shall comply with EN 280‑1:2022, 4.10.
4.2.9 The electrical equipment shall comply with EN 280‑1:2022, 4.8 and EN 60204‑32:2008. 4.2.10 The control position of the lifting equipment shall comply with EN 280‑1:2022, 4.7 and have an emergency stop according to EN ISO 13850:2015. All emergency stop devices (on the MEWP and on the load lifting appliance) shall stop all movements of the MEWP and the load lifting appliance.
4.2.11 It shall be possible to activate power‑operated lifting equipment from an additional position easily accessible from the ground as an overriding emergency control function. The additional control
position shall comply with EN 280‑1:2022, 4.7.4.
4.2.12 Means shall be provided to control lowering of the load of the hoist even in case of loss of power supply.
NOTE Use of the boom functions is permissible.
4.3 Structural and stability calculations
The load lifting appliance and its interface with the MEWP shall comply with EN 280‑1:2022, 4.2.5.2 and 4.2.5.3. The force from the hoist load shall be considered when designing the MEWP (see EN 280‑1:2022, 4.2.3.5). To consider dynamic effect of hoisting, the hoist load shall be multiplied by a dynamic factor in accordance with EN 13001‑2:2021, 4.2.2.2, using hoisting class HC1 (see Table 1).
Wind forces on the hoist load shall be calculated in accordance with EN 13001‑2:2021, 4.2.3.1.
4.4 Methods to avoid overturning and exceeding permissible stresses
4.4.1 The combination of the MEWP with the load lifting appliance shall be equipped with a safety function according to EN 280‑1:2022, 4.4.1.2, 4.4.1.3 and/or 4.4.1.4 which avoids the risk of overturning and exceeding the permissible stresses. In addition to the requirements in EN 280‑1:2022, 4.4.1 the safety function shall also stop the powered load lifting appliance. The safety function shall comply with EN 280‑1:2022, 4.11.
4.4.2 Where the rated load of the load lifting appliance is greater than the rated load of the work platform, a safety function according to EN 280‑1:2022,4.11 with at least PL c shall prevent the load of the load lifting appliance being applied to the work platform.
4.4.3 The load lifting appliance shall have a rated capacity limiter according to 4.11 of EN 280‑1:2022 with at least PL c to prevent overload and to prevent permissible stresses from being exceeded.
4.4.4 The MEWP and load lifting appliance combination shall meet the stability requirements of EN 280‑1:2022, 4.2.4 to prevent overturning under the least favourable combination of loads, forces and extending structure position, under foreseeable operating conditions including:
a) any possible combination of loads within the total capacity of the machine, of the load lifting appliance (from zero to the rated load of the load lifting appliance) and the loads on the work platform (from 80 kg for one person to the rated load of the work platform);
b) dynamic forces arising from the lifting and lowering process;
c) the effect of a sudden loss or snagging of the hoisted load;BS EN 280-2 pdf download.