What is control joint in construction?
What is control joint in construction?
A control joint is a continuous vertical joint filled with mortar, but with a bond breaker on one side so that tensile stress cannot develop across the joint. If control joints are not provided, a concrete masonry wall may crack as it shrinks over time.
What are seismic joints?
Seismic joints occur naturally when one building is built adjacent to another, whether or not the buildings are linked functionally. Seismic joints are also frequently introduced to separate wings, or other parts of a single building.
What are expansion joint covers?
Expansion Joint Cover is a cover or a covering system that protects the structural gap designed to accommodate the movement of the building in a controlled to prevent damages to the building finishes.
What is a roof expansion joint?
An expansion joint cover is what you see on a roof, and it allows the roof membrane to expand and contract in sync with the roof deck, without compromising the roof system. Roof expansion joint covers are typically just called “expansion joints”.
What are construction joints?
A construction joint is a type of concrete joint that is used when a new section of concrete is poured adjacent to another concrete section that has already set. The purpose of a construction joint is to allow for some horizontal movement, while being rigid against rotational and vertical movement.
What is a control joint vs expansion joint?
In building materials, a control joint is used to control cracking while an expansion joint is designed to handle structural movement.
What are the types of construction joint?
There are two primary joint types:
- Permitting shrinkage/contraction movement.
- Permitting expansion and shrinkage/contraction movement.
Where are expansion joints required?
Concrete expansion joints are particularly important where there have been consecutive concrete pours and are also useful when laying concrete within an area bordered by walls or buildings or if objects such as manhole covers need to be incorporated.
What is the difference between a control joint and an expansion joint?
Control joints can be isolated within the plane being treated (brick facades, concrete sidewalks) while expansion joints must bisect the entire structure thereby creating a gap throughout all of the building elements—foundation, walls, curtainwalls, plaza decks, parking decks, floors, and roof.
What is expansion joint made of?
Expansion joints are usually made from metal, rubber, or braided. (Braided stainless steel hoses with flexible or metal liners are not expansion joints.) Metal expansion joints are mostly used in applications with the issue of thermal expansion.
What are types of construction joints?
In slabs, there are three types of joints: Isolation joints (also sometimes functioning as expansion joints) Construction joints (which can also function as contraction joints) Contraction joints (also sometimes called control joints)
What is the difference between construction joint and control joint?
Both isolation and construction joints are formed before the concrete is poured; contraction joints (or control joints) are “placed” in the fresh concrete before it has a chance to create its own joints—also known as cracks.
What are construction joints give examples?
Working Construction Joints An example of a working construction joint would be a shingle roof, which is made up of small units of materials that overlap so that they allow for thermal or moisture movement without causing damage to the shingles.
What is a Type B construction joint?
We can leave the surface with a specified amplitude typically up to 10 mm. We are often requested to clean up or create construction joints prior to a final pour of concrete – these are sometimes called ‘Type B Construction Joints’.
How many types of expansion joints are there?
Based on the type of material used in making of joint, expansion joints are further classified into following types, Rubber expansion joint. Fabric expansion joint. Metal expansion joint.
What is the minimum of expansion joint in building?
As per IS 3414 which is a specific code for joints, it is mentioned as 30m. Expansion joint shall be so provided that the necessary movement occurs with a minimum resistant at joint. The structures adjacent to joint should be preferably supported on separate columns. Reinforcement shall not extend across the joint.
What is composite joints and connections?
Composite joints and connections is a valuable reference for composite manufacturers and composite component fabricators, the aerospace, automotive, shipbuilding and civil engineering industries and for anyone involved in the joining and repair of composite structures.
What are the different books in the joints in steel construction series?
Other books in the series are Joints in simple construction, Volumes 1 and 2 (shortly to be replaced by Joints in steel construction – Simple Connections), and Joints in steel construction – Moment Connections. This guide includes composite end plate connections suitable for use in semi-continuous braced frames.
What is the CS expansion joint cover?
The CS Expansion Joint Cover team worked closely with HNTB to create a unique system of stair risers and treads to ensure that fans, students and athletes would be safe in the event of a seismic event. This distinctive project required careful consideration of the location of the cover.
What is composite sheet?
Composite sheet consists of a thin sheet steel with intumescent embedded onto a single side. Composite sheet partners with other SpecSeal firestop products such as Firestop Collars and EZ Path Devices to size down oversized openings.