JCT PSR Stud Rails
Punching shear resistor (PSR) studs are largeheaded shear connectors that are welded to flat steel bars (creating stud rails) and used for shear reinforcement in flat concrete slabs to replace stirrups and column capitals to resist the punching shear stress in the slabs.
Description
Punching shear resistor (PSR) studs are large headed shear connectors that are welded to flat steel bars (creating stud rails) and used for shear reinforcement in flat concrete slabs to replace stirrups and column capitals to resist the punching shear stress in the slabs. Studs of a predetermined length and diameter, according to design specifications in compliance with IBC and UBC Structural Steel Welding Standards, are used to extend the column perimeter into the floor or foundation slab. This reduces the amount of reinforcing bar required in an area and column congestion resulting in easier and faster installation, as well as lower cost. Using these PSR stud rails, you increase the punching shear capacity at the base of the concrete columns, resulting in a significant reduction in slab thickness. This creates a substantial savings in labor and material costs.
PUNCHING SHEAR RESISTOR (PSR) STUDS
Benefits of Using PSR Stud Rails
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Eliminating the need for column capitals and stirrups
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Reduction of setup and installation time.
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Reduction of congestion around column/slab connections.
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Distribution of force over a greater critical area.
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Providing higher tensile strength and more ductile performance of the concrete slab.
Punching Shear Resistor (PSR) Application
Tru‐Weld punching shear resistor (PSR) studs are large‐headed shear connectors that are welded to flat steel bars (creating stud rails) and used for
shear reinforcement in flat concrete slabs to replace stirrups and column
capitals to resist the punching shear stress in the slabs.
Studs of a predetermined length and diameter, according to design specifi‐
cations in compliance with IBC and UBC Structural Steel Welding Standards,
are used to extend the column perimeter into the floor or foundation slab.
This reduces the amount of reinforcing bar required in an area and column
congestion resulting in easier and faster installation, as well as lower cost.
Using these PSR stud rails, you increase the punching shear capacity at the
base of the concrete columns, resulting in a significant reduction in slab
thickness. This creates a substantial savings in labor and material costs.
PSR Stud Specifications
Stud Diameter Head Diameter Head Thickness 3/8” (9.5mm) 1.19” (30.1mm) 0.26” (5.3mm)
1/2” (12.7mm) 1.58” (40.2mm) 0.33” (7.1mm)
5/8” (15.9mm) 1.98” (50.2mm) 0.40” (8.9mm)
3/4” (19.1mm) 2.37” (60.2mm) 0.47” (10.7mm)
Material
ASTM A108 / A29
Grade 1010‐1020
Properties;
Yield ‐ 51,000 PSI
Tensile ‐ 65,000 PSI
Elongation ‐ 20% Min.
Reduction Of Area ‐ 50% Min.