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Current versions of these codes and standards now agree that handrail is defined as either a circular cross section with an outside diameter of 1 + 1 ⁄ 4 inches (32 mm) minimum and 2 inches (51 mm) maximum or a non-circular cross section with a perimeter dimension of 4 inches (102 mm) minimum and 6 + 1 ⁄ 4 inches (159 mm) maximum and a ...
Due to the excessive load requirements [2] of this type of railing system, post construction is critical to the success of cable railings.. Cable railing requires very rigid frames compared to many other types of railings due to the forces applied to the end posts by tensioning the cables.
Handrails are necessary because these bridges are prone to oscillate side to side and end to end. Rarely, the footrope (or footrope plus handrails) is combined with an overhead rope similar to a zip-line or cableway. In some cases, such as the Capilano Suspension Bridge, the primary supports form the handrails with the deck suspended below them ...
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The alternating stairs (3) requires one unit of space per step: the same as the half-width stairs (2), and half as much as the full-width stairs (1). Thus, the horizontal distance between steps is in this case reduced by a factor of two, reducing the size of each step.
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