The longitudinal shear connection between the steel section and the concrete is provided by shear connectors, which normally take the form of studs welded to the top of the steel section. All connectors should be capable of resisting uplift forces caused by the tendency for the slab to separate from the beam as it bends. In the case of shear studs this is achieved by the head of the stud. Although shear connectors ensure adequate fixing of the decking to the beam, they are not needed simply to achieve this. They should only be used when it is desired to achieve composite action between the slab and the steel beam.
1-The Steel deck surface should be cleaned before any welding process starts
2-After the installation of the steel deck the surface should not have any dirt ,paint spill overs, oil or water.
The STEEL DECK AND THE CONSTRUCTION SHOULD BE LOCKED TOGETHER. THE GAP BETWEEN THE DECK AND THE CONSTRUCTION SHOULD BE AVOIDED . IN CASE OF ANY GAP THE STUDS WOULD GO THROUGH THE DECK BUT MAY NOT TOUCH THE STEEL BELOW. AS A RESULT THEY WOULD NOT WELD !!!
3-In case of welding over the steel deck additional welding time and the ampere of the electrical current should be taken into account. Few shears stud should be tested before carrying on with the rest of the welding.
4-Further testing should be carried out in different parts of the surface as well; as the steel construction hardness may be different .
5- The welding gun should not be placed on the steel deck at any time as there is risk of short circuit as it touches the steel deck
6-After welding the shear stud looses some of its height, they are about 5mm shorter
7-Sufficient concrete cover should be provided over the shear studs
8-Ceramic ferrules left over from the shear studding process can be left distributed over the decking surface and lost within the concrete pour.
7-Additional reinforcement in shallow places of the steel deck should be provided in addition to steel mesh installation.
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Welding ceramics are strong to help you achieve the perfect welding result. Ceramics for direct welding to steel or through welding are supplied with the shear stud connectors without any additional cost
The Shear Stud is made of steel and it is delivered with a ceramic ferrule to ensure a good connection of the Stud with the beam.The shear Studs are available in different lengths and diameters . The length of the Stud will be reduced by approximately 5mm during the welding process. All Shear Studs are supplied with ferrules. The ferrules are made of clay and able to withstand heat shock as well as high temperatures without melting or breaking.
Good quality shear studs depend on many manufacturing criterias. Eventhough all shear studs may look alike the specifications of making a quality shear stud is of utmost importance in steel construction practice. The following are the practices we carry out in manufacturing our shear studs.
Shear stud order specifications are shown above.
Tensile and yield strength tests are carried our regularly for each order and test certificates are supplied on request.
Being able to determine the chemical composition of the raw materials for shear studs is a must for a good quality end product.
Phosphating gives the shear stud ability to stand against rust for a long time.Shear stud free of rust is better suited for welding .
Aluminum flux is inserted at the centre by special machines to ensure perfect ignition during stud welding process
Shear Stud is R corner , easy to insert into ceramic therefore increasing productivity of welding proces.
Shear Stud heads are smooth to ensure the flow current smoothly ,therefore saving energy.
The diameter of shear studs are within the ISO 13918 specifications.
The most common mistake that affects welding is to leave a gap between the decks and the beams during installing decks. This mistake can cause trouble for the stud welders .The gap between the deck and the beam prevents the studs to reach the beam resulting in poor welding and failure. The video shows how this mistake can be prevented.