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A expansion joint, or movement joint, is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials. They are commonly found between sections of buildings , bridges , sidewalks , railway tracks , piping systems , ships , and other structures.
In earlier days, birch bark was occasionally used as a flashing material. [7] Most flashing materials today are metal, plastic, rubber, or impregnated paper. [8]Metal flashing materials include lead, aluminium, copper, [1] stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminium, terne-coated copper ...
They are differentiated according to the three basic types of movement: axial, angular and lateral expansion joints. Expansion joints have usage in various sectors, like energy production, paper industry, chemical industry, water treatment, oil and gas. Expansion joints can be used wherever thermal movements or vibration occurs in pipelines.
Flashing systems in cavity walls are typically located close to the base of the wall, so that it will collect the water that goes down the wall. Weep holes are drainage holes left in the exterior wall of the cavity wall, to provide an exit way for water in the cavity. Expansion and control joints do not have to be aligned in cavity walls.
A curtain wall is an exterior covering of a building in which the outer walls are non-structural, instead serving to protect the interior of the building from the elements. Because the curtain wall façade carries no structural load beyond its own dead load weight, it can be made of lightweight materials.
For high pressure, flare joints are made by doubling the tube wall material over itself before the bell end is formed. The double flare avoids stretching the cut end where a single flare may crack. Before the flaring step, the end of the tube is compressed axially causing the tube wall to yield radially outward forming a bubble.
A building joint is a junction where building elements meet without applying a static load from one element to another. When one or more of these vertical or horizontal elements that meet are required by the local building code to have a fire-resistance rating, the resulting opening that makes up the joint must be firestopped in order to restore the required compartmentalisation.
An integral bridge contains no expansion joints, spanning monolithically from abutment to abutment. [1] Movement due to thermal expansion and contraction or braking loads is accommodated by the end walls or abutments. [2] [3] Where intermediate supports are specified (e.g. bridge piers) these may also serve to resist thermal expansion movements ...