Selecting a jib crane to match application requirements involves assessing key elements such as operation type, available structure, needed options, and cost of jib crane plus installation. These are goals that sometimes conflict with each other, and require specific application understanding for proper execution.
Consider the following factors in selecting the appropriate jib crane type and capacity for your operations:
Span is the length of the boom from the midpoint of the mast, or mid-point of wall bracket, to the end of the boom. This length should be the total distance out from the mast that materials will be lifted from and allow for trolley and hoist mechanism width.
Working span is calculated on amount of working space needed; working distance is about 1/2 the trolley length from the end of the beam (or distance from the vertical support member to the end of the beam)
Rotation is determined by the type of jib crane selected; free standing and mast type jib cranes offer 360 degrees of rotations while wall mounted cranes provide 200 degrees of rotation
The capacity rating of jib crane must exceed maximum weight of materials to be handled and is based on the design load which includes allowance for the hoist and trolley weights plus impact load and deflection compensation
Underboom height is the distance from the floor to the underside of the boom and should exceed the lifting distance required for effective materials handling
Overall height is the highest point of the crane after installation and should fit within the available headroom that is free of obstructions in order for the boom to move freely
Power-motor considerations include how much power is needed, which components need power (jib rotation, trolley, hoist or all three), how and where the power will be supplied, and whether system will be used indoors or out.
Installation involves ease of assembly, and support needs (whether or not a second-pour foundation or building supports are needed). Is the building ready? Is the surface? Do you have the correct i-beam or structural posts for the crane you need?