Determining Capacity, Weight, Length, and Height
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- Capacity: Load weights should be predetermined in order to avoid buying extra, unneeded capacity. Bridge dead weight will ad more weight to the load the operator will be moving.
- Width: Bridge span is the length of a bridge between centers of two runways. The standard design provides a standard bridge overhang of 12 in. on each end beyond the runway centerline. Bridge length is the overall length.
- Length: Runway length is determined by the length of a specific area requiring coverage. Runways are supported on maximum 20, 25 or 30 ft. support centers. Plain track runways are supported every 6 ft. for 400, 500, 600 and 900 series and every 9 ft. for 700 series.
- Height: In order to attain minimal resistance, it is recommended that the trolley clevis height be kept as low as possible, with practical consideration given to minimum headroom requirements. Height is measured from the floor to the trolley clevis from which a hoist is suspended.