HH Rung

This is the standard solid rung for the following steel cable trays, 30" and 36" wide: NEMA Class 12B and 12C ladder and ventilated/trough trays with flange-in side rails. NEMA Class 20A, 20B and 20C, mill galvanized, ladder and ventilated/trough trays.

RUNG TYPE MECHANICAL PROPERTIES
HH
SOLID Thickness = 0.048"
Moment of Inertia: Ix = 0.0175 in4
Section Modulus: Sx = 0.0456 in3
RUNG
SPACING
LOAD
TABLE
SAFE LOAD LIMITS (LBS/FT)
TRAY WIDTH (IN.)
6 9 12 18 24 30 36 42 48
5"
1
4742 3162 2371 1581 1186 948 790 SU SU
2
4742 3162 2371 1442 842 481 241 SU SU
6"
1
3952 2635 1976 1317 988 790 659 SU SU
2
3952 2635 1976 1202 702 401 201 SU SU
9"
1
2635 1756 1317 878 659 527 439 SU SU
2
2635 1756 1317 801 468 267 134 SU SU
12"*
1
1976 1317 988 659 494 395 329 SU SU
2
1976 1317 988 601 351 201 101 SU SU
1

Safe Load/Cable Load Only: Allowable uniformly-distributed cable load expressed in lbs/linear foot of tray length, based on the load carrying capability of the rung with a safety factor of 1.5. To convert Safe Load/Cable Load Only to reflect a safety factor of 2.0, multiply the safe loads shown by 0.75.

2

Safe Load / Cable Load +200 lbs: Allowable uniformly-distributed cable load expressed in lbs/linear foot of tray length, based on the load carrying capability of the rung with a 200 lb. concentrated static load applied at the center of the rung, without collapse.

3

Will not support a 200 lb. concentrated static load applied at the center of the rung.

[XX] Two digit code in the safe load limit tables indicates recommended rung option for specified width.

* Single rung load capacity: The data shown for 12" rung spacing is equivalent to the load capacity of the single rung.