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Handrail diameter. The size has to be comfortable for grasping and is typically between 1.25 and 2.675 inches (31.8 and 67.9 mm). Maximum space between the balusters of the handrail. This is typically 4 inches (102 mm). Openings (if they exist) between the bottom rail and treads are typically no bigger than 6 inches (152 mm).
The Australian standard pallet is a pallet size commonly found in Australia but rarely found elsewhere. It is a square pallet originally made of hardwood 1,165 mm × 1,165 mm (45.9 in × 45.9 in) in size which fits perfectly in the RACE container of the Australian Railway. They are ill-suited for the standard 20-foot (6.1 m) and 40-foot (12 m ...
A dog-leg staircase A quarter-landing, on a dog-leg staircase, is made into an architectural feature, by the use of arches, vaulting and stained glass. A dog-leg is a configuration of stairs between two floors of a building, often a domestic building, in which a flight of stairs ascends to a quarter-landing before turning at a right angle and continuing upwards. [1]
Stringers are beams set on top of the floor beams, parallel to the chords. A stringer may have a depth-to-width ratio anywhere from 2-to-1 to 6-to-1. A ratio greater than 6-to-1 is avoided in order to avoid buckling. In practice, most wood stringers are 16 inches (410 mm) in width due to limitations in milling.
A licensed engineer can help operators design a safe, appropriate timber bridge. Personnel from Virginia Tech have described in detail how to build a stringer bridge using standard bridge design procedures, for example, by placing timber stringers across the abutment, using a bent to support a trestle or timber frame. Their methods are quick ...
Built in 1899, the curved trestle has an overall length of 323 feet and rises 52 feet above the canyon floor. Vertical supports spaced 15 feet apart consist of 12" x 12" timbers. The rails (removed in 1948) and crossties were placed on 8"x16" stringers held together with three-quarter-inch bolts and cast iron spacers.