Plank Ladder Rungs - Small Hole Traction TreadTM: Load Table              

Traction TreadTM Ladder Rung
Gauge: 13 GA Steel
Ladder Rung Description Span
2’-0 3’-0 4’-0
2 Row C 680 420 320
  D 0.12 0.18 0.43
3 Row C 495 340 250
  D 0.11 0.22 0.51
4 Row C 885 620 450
  D 0.08 0.16 0.37

Notes: Values are based on concentrated load placed at mid-span with a safety factor of 2.0.
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Traction TreadTM Ladder Rung
Gauge: 11 GA Steel
Ladder Rung Description Span
2’-0 3’-0 4’-0
2 Row C 809.2 499.8 380.8
  D 0.11 0.17 0.42
3 Row C 589.05 404.6 297.5
  D 0.1 0.21 0.5
4 Row C 1053.15 737.8 535.5
  D 0.07 0.15 0.36

Notes: Values are based on concentrated load placed at mid-span with a safety factor of 2.0.
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Traction TreadTM Ladder Rung
.125" Aluminum
Ladder Rung Description Span
2’-0 3’-0 4’-0
2 Row C 659 407 310
  D 0.24 0.36 0.87
3 Row C 479 329 242
  D 0.222 0.44 1.03
4 Row C 856 600 436
  D 0.162 0.35 0.75

Notes: This data represents estimates of load capacities for .125" aluminum. Data based on conversion of load table data from 13 GA steel, and applying appropriate factors for thickness, yield and youngs modules.
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