1979 The effects of rung spacing on the mechanics of ladder ascent. PhD Dissertation presented to the Department of Physical Education and the Graduate School of the University of Oregon.McIntyre, D.R., 1979. The effects of rung spacing on the mechanics of ladder ascent. Ph.D. Dis- serta...
a16. Feeder cables Ladder, Provisions shall be made and all material pervaded for the installation of an internal feeder cables ladder from the base to tower top. These ladders shall provide secure support coax runs for at least 10 runs of coax along the tower length. The ladders have 0.9 ...
A game includes ladder-like targets assembled from tubular rods coupled to each other by various tees and angles. The rods are most preferably a rigid, lightweight, weather-resistant material such as PVC or the like. The couplings can be permanent or removable, depending upon the need for sto...
a15. Procisions shall be made and all material pervaded for the installation of an internal climbing ladder from the base to the tower top. The rung width shall be at least 40.0 cm with the step diameter being a minimum of 1.6 cm; the maximum adjacent rung spacing shall be 40.0cm.The ...
Rung spacingClimbing biomechanicsThis study investigated the effects of aerial ladder rung spacing on firefighter climbing biomechanics. Ten female and 9 male firefighters ascended and descended instrumented ladders with rungs spaced at 356?mm (current design) and 305?mm in a laboratory setup. The ...
The upright is provided with holes at a set spacing along its length which allow the insertion of the rung (5), the groove also being provided with holes to allow insertion of a countersunk fixing screw (4). The rung presses against the internal face (11) of the upright but because the...
The upright is provided with holes at a set spacing along its length which allow the insertion of the rung (5), the groove also being provided with holes to allow insertion of a countersunk fixing screw (4). The rung presses against the internal face (11) of the upright but because the...
The present invention provides steel flat bars bent to fit the rung spacing of the ladder with a steel tube welded at each end sized to fit snuggly into the opening of any two consecutive rungs in that ladder. The ladder can now be used to access the roof of a building without resting...
Multi-purpose inter-connectable ladder section - has rung spacing to allow fitting of still ends for fixing by sprung bolts in matching aperturesThe ladder sections (B) have sprung bolts (1, 2) and staple holes (3, 4) for connection one to the other to form extended ladders, 'A' frame...
Multi-purpose inter-connectable ladder section - has rung spacing to allow fitting of still ends for fixing by sprung bolts in matching aperturesThe ladder sections (B) have sprung bolts (1, 2) and staple holes (3, 4) for connection one to the other to form extended ladders, 'A' frame...