What should be tested & inspected at the construction site before installation of builders hoist?

- Aug 15, 2018 -

What should be tested and inspected at the site before installation of builders hoist?  

At least the contents of following aspects

Inspection of mast and tie-in of hoist must satisfy:

a. Location, dimension and load capacity of ground base shall meet the requirement;

b. Hoist Mast sections and racks are in good condition;

c. Hoist Mast has been installed correctly;

d. Elevator Mast is used and fixed according to the scheduled hoisting height;

e. Fastening of all the connecting bolts of lifts mast section meet the requirement;

f.  Fastening of racks on elevator mast meet the requirement;

g. Installation of hoist tie-ins meets the requirement and the tightening of all connecting bolts meets the requirement;

h. Space between lifts tie-ins and height of free end (remote elevation) of lifts mast meet the requirement;

i. Installation positions of all the limit touch plates meet the requirement;

Inspection of elevator ground enclosure must satisfy:

a. Internal and external installation position of elevator enclosure meets the requirement;

b. All the components of construction hoist enclosure shall be with enough intensity and rigidness to guarantee correct running clearance;

c. Action of mechanical and electrical interlock devices of construction lifts enclosure door is correct;

d. Installation of construction elevator base-frame and the quantity, specification, layout and fastening of foundation bolts meet the requirement;

e. Rack and pinion hoist cage and buffer device are installed correctly;

f.  Installation position of cable drum is correct.

Inspection of lifts cage must meet:

a. Dimension and load capacity of builders hoist cage meet the requirement;

b. Structure (including welding line) intensity and rigidness meet the requirement;

c. Dimension, intensity and electric-mechanic interlock device of lifts cage’s entrance door meet the requirement and the door can be opened smoothly; the exit door of cage cannot be opened during running;

d. All the guide rollers and safety hooks of the rack and pinion elevator are installed correctly;

e. Lifts cage floor is not damaged and not slippery;

f. Safety fence on the top of lifts cage meet the requirement;

g. Construction Hoist Cage top crane is in good condition and installed firmly enough on cage, and the position is right.

Inspection of rack and pinion elevator transmission mechanism (drive device) must satisfy:

a. Lifts drive device is correctly installed on the top of cage and there is not crack and damage in the welding line of relevant stressed parts;

b. Lifts drive pinions are in good condition, and the meshing status with rack meet the requirement;

c. The tightening of back wheels and the interval between them and the rack’s back meet the requirement;

d. The elevator reducers are in good condition, and the lubricant oil grade and oil level indicator meet the requirement;

e. Brakes are equipped with regulated function.

Inspection of cable guide device must satisfy:

a. Installation position of cable guide is correct and the spacing meets the requirement;

b. Protective rubber strips on cable guide frame are in good condition;

c. Fastening of cable arm on the hoist cage meet the requirement;

d. Installation and wiring of cable meet the requirement;

Inspection of hoist electrical system must satisfy:

a. Switch box and leakage protector shall be equipped;

b. Wire and cable shall be with good insulating property, free from damage and electric leakage;

c. Ground resistance shall not be more than 4Ω.

Control system:

a. The full set of outdoor elevator electrical control system is in good condition;

b. Installation site of all the control devices is proper and safe during use.

⑧ Full range running outdoor elevator car status must satisfy:

a. Safe distance between the highest point of full range running elevator car and the top of mast meet the requirement;

b. Distance between the lowest point of full range running elevator car and the ground meet the requirement;

c. Construction elevator car in the lowest travel position is in good condition and action of all the limit switches is correct and reliable.

Inspection of operating environment:

a. Signs

There shall be product name plates at eye-catching location of hoist, showing information such as rated payload,rated passenger and other technical parameters.

b. Passageway and surrounding environment

There is no barrier in running passageway of lifts cage. The structure and components of passenger and material hoist, such as mast, tie-in and landing devices etc., shall not be used to pull or hang scaffold, construction pipe, rope slogan and flag etc. Within 5m around passenger and material hoist base, well or ditch are not allow to dig, flammable and combustible articles or other sundries shall not be piled up.

c. Distance between moving parts and building and fixed equipment.

Safe distance between moving parts of the rack and pinion hoist and building and fixed equipment shall not be less than 0.2m.

d. Distance between hoist and outside overhead power transmission line.