Harrington Hoists and Cranes Series 3 End Truck - Manual (Page 21)

2.4.2 End Trucks
a) Determining Dimensions
(1) Underhung - Select the proper runway I-beam from Table 2-2. Be sure runway has
enough strength to support the load.
Table 2-2 Under Hung Runway I-Beam Dimensions
END TRUCK CAPACITY 1 - 3 TON 5 TON
I-BEAM FLANGE WIDTH (A) 3” - 6” 4” - 6”
MINIMUM HEIGHT OF I-BEAM (B) 6” 8”
(2) Top Running - Select the proper rail size from Table 2-3. Be sure runway has enough
strength to support the load.
Table 2-3 Recommended A.S.C.E. Rail Sizes in Weight per Yard
END TRUCK
CAPACITY
SPAN
1 TON 2 TON 3 TON 5 TON 8 TON 10 TON
UP TO 35’ 30 30 30 40 40 60
35’ TO 60’ 30 30 30 40 40 60

Improper installation or fit of end trucks to crane runways could result in death or
serious injury, and property damage.
b) Cautions for Installation
(1) Install the two crane runways horizontally and in parallel to within the following limits see
Table 2-1.
(2) Install the two crane runways vertically to within the following limits see Table 2-1.
(3) Carefully select building beam or columns having sufficient strength to support crane
runways securely.
2.4.3 Bridge
The end trucks covered by this manual are designed for bridge beam assemblies fabricated
according to the appropriate Harrington Bridge Beam Assembly Drawing, which use beams in
accordance with the following tables.
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