Published at Wednesday, September 28th, 2016 - 18:08:13 PM. Door. By john.
Building access Since at least medieval times there have been hinges to draw bridges for defensive purposes for fortified buildings. Hinges are used in contemporary architecture where building settlement can be expected over the life of the building. For example, the Dakin Building in Brisbane, California, was designed with its entrance ramp on a large hinge to allow settlement of the building built on piles over bay mud. This device was effective until October 2006, when it was replaced due to damage and excessive ramp slope.
Hinge terminology : Components : Pin The rod that holds the leaves together, inside the knuckle. Knuckle The hollow—typically circular—portion creating the joint of the hinge through which the pin is set. The knuckles of either leaf typically alternate and interlock with the pin passing through all of them. (aka. loop, joint, node or curl) Leaf The portions (typically two) that extend laterally from the knuckle and typically revolve around the pin. Characteristics End Play Axial movement between the leaves along the axis of the pin. This motion allows the leaves to rotate without binding and is determined by the typical distance between knuckles (knuckle gap) when both edges of the leaves are aligned. Gauge Thickness of the leaves. Hinge Width Length from the outer edge of one leaf to the outer edge of the other leaf, perpendicularly across the pin(aka open width). Hinge Length The length of the leaves parallel to the pin. Knuckle Length The typical length of an individual knuckle parallel to the pin. Leaf Width Length from the center of the pin to the outer edge of the leaf. Pitch Distance from the end of a knuckle to the same edge of its adjacent knuckle on the same leaf Slop A colloquialism referring to loose angular movement of the leaves relative to the pin.
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