Elevator roof hook usually a few?
One to three according to the type of load of the lift is generally determined to have a room without a machine room two heavy or non standard according to the site conditions are three
General requirement is that there is at least one computer room, bearing capacity of not less than 2T
The roof is the top of the well, the roof of the hoistway is not required to be a lift.There is room lift hook in the room, a sufficient.No room elevator is doing well in the hook on the roof, but there are exceptions, such as the Hitachi machineroomless elevator UAX model does not need to do is hook.
Generally 4.1, lift hook are generally designed on the staircase roof beam, because the actual use of lifting hook just as the host installation of the elevator, installed after the elevator has no effect (days after if the replacement can also be used to host). So for the structure, the hook load is only a temporary role, so in the structure only need to consider some reinforcement can be reinforced. The day after the lift in the use process, the driving wheel force by supporting the elevator at the ends of the I-shaped steel beam, floor stairwell position does not bear the lift load, so after the openings on the structure effect of co..2, according to the installation of engineering, with good ductility of a hook steel production, steel strength design for the design value of 50Mpa, usually in the building structure design strength of steel is 210Mpa, which is mainly on account of the installation process and more unpredictable factors belong to dynamic load. In order to reduce the strength of the steel design and the use of better ductility of the first grade steel, in order to ensure the safety factor, if the steel failure can be found in large deformation, to prevent accidents.3, according to the general design of construction drawing, such as unclear ask elevator manufacturers and technical personnel. Generally as long as the hook can be hung on the hook hanging manual line.
