Shear Connector Stud

Weld-through shear connector studs and reduced base arc studs with matching ceramic ferrules for composite steel deck and beam construction.

About the Shear Connector Stud

Shear studs are welded onto steel beams, often through the steel decking, so the concrete slab poured on top works together with the beam in composite floors. They come in 16, 19 and 22mm diameter from 75 to 250mm long, with DF thru-deck, UF clean beam and RF ceramic ferrules to match, plus class 4.8 reduced base arc studs in M16 and M20, all listed by Hobson against AS 1554.2. Choose the type and size above; the guide below covers sizes, head dimensions and which ferrule to use.

Also called shear studs, shear connectors or weld studs.

Features

Shear connector studs: 16mm (75 to 150mm), 19mm (75 to 250mm) and 22mm (100 to 250mm)
Reduced base arc studs, class 4.8, M16 x 40 to 75mm and M20 x 50mm
DF ceramic ferrules for through-deck use, 16, 19 and 22mm
UF ceramic ferrules for clean beam use, 16, 19 and 22mm; RF ferrules for reduced base studs, 16 and 20mm
Specification listed as AS 1554.2

Applications

Composite steel deck slabs (through-deck stud welding)
Composite steel and concrete beams
Stud welding with matching ceramic ferrules

What shear studs do

A shear connector stud is a plain steel stud with a round head that is stud welded to a steel beam, then cast into the concrete slab poured over it. Hobson describes it as a structural connection between the steel structure and the concrete: the shear studs make the steel and concrete act together (composite action), which makes the structure more efficient. Hobson lists bridges, industrial structures and high-rise buildings, and the usual places are composite steel deck slabs and composite steel and concrete beams.

Hobson publishes no shear capacities for these studs. The stud diameter, length, number, spacing and the welding are set by the structural engineer's design and the project's welding specification. Hobson lists the studs and ferrules against AS 1554.2, and its test certificates for the shear studs (ultimate tensile strength, yield strength and elongation after fracture) can be downloaded from hobson.com.au.

Shear stud sizes

Select a row to open that stud in the selector.

Every shear connector stud we carry (plain carbon steel, SD type), by diameter x length. Dimensions in mm from Hobson's shear connector stud sheet: shaft diameter, length, head diameter and head height. Pack is the minimum order quantity. Tap a number to show it in the selector above.

Stud	Shaft diameter	Length	Head diameter	Head height	Pack
16 x 75	16mm	75	32	8	50
16 x 100	16mm	100	32	8	25
16 x 125	16mm	125	32	8	25
16 x 150	16mm	150	32	8	30
19 x 75	19mm	75	32	10	35
19 x 90	19mm	90	32	10	30
19 x 95	19mm	95	32	10	30
19 x 100	19mm	100	32	10	30
19 x 115	19mm	115	32	10	25
19 x 125	19mm	125	32	10	25
19 x 150	19mm	150	32	10	20
19 x 175	19mm	175	32	10	20
19 x 200	19mm	200	32	10	15
19 x 250	19mm	250	32	10	15
22 x 100	22mm	100	35	10	20
22 x 125	22mm	125	35	10	20
22 x 150	22mm	150	35	10	15
22 x 175	22mm	175	35	10	15
22 x 200	22mm	200	35	10	15
22 x 250	22mm	250	35	10	10

Which ceramic ferrule?

Shear studs are sold without ferrules: order the ceramic ferrule that matches the stud diameter and the job. Hobson's types are DF thru-deck ferrules, for welding studs through steel decking, and UF clean beam ferrules, for welding straight onto the beam. RF ferrules suit the reduced base arc studs.

Ceramic ferrules we carry, by type and stud diameter. Dimensions in mm from Hobson's dimension data: inside diameter, outside diameter and height. Packs of 100. Tap a number to show it in the selector above.

Ferrule	For stud	Inside diameter	Outside diameter	Height	Pack
DF thru-deck
DF thru-deck	16mm	17	30	17	100
DF thru-deck	19mm	20	34	15	100
DF thru-deck	22mm	23	39	19	100
UF clean beam
UF clean beam	16mm	17	30	13	100
UF clean beam	19mm	20	31	16.5	100
UF clean beam	22mm	23	39	19	100
RF reduced base stud
RF reduced base stud	16mm	17	30	15.5	100
RF reduced base stud	20mm	21	32	22	100

Reduced base arc studs

A reduced base arc stud is a threaded weld stud (class 4.8, plain) whose shank diameter at the base is less than the thread's major diameter. Hobson says this is designed for the thread diameter of the stud to exceed the weld fillet, and it is used to decrease the clearance hole size. Each stud has a flux ball at the end to stabilise the arc, for a stronger and cleaner weld, and is about 3 to 4mm longer before welding than after. Hobson lists wear plates, applications needing limited space around the stud, electronic and automotive assemblies, and construction.

Reduced base arc studs we carry, by thread x length after welding. Dimensions in mm from Hobson's reduced base arc stud sheet (2026). Hobson's dimension data gives slightly different figures for the M16 x 40 (thread 32.5, length before weld 43.6). Pack is the minimum order quantity. Tap a number to show it in the selector above.

Stud	Reduced base diameter	Thread length	Length before weld	Length after weld	Pack
M16 x 40	13.2	33.0	43.0	40	50
M16 x 50	13.2	42.5	53.6	50	50
M16 x 55	13.2	47.5	58.6	55	50
M16 x 60	13.2	52.5	63.6	60	50
M16 x 65	13.2	57.5	68.6	65	50
M16 x 75	13.2	67.5	78.6	75	25
M20 x 50	16.5	41.0	53.9	50	25

Finish

All the studs on this page are plain steel with no added coating (listed by Hobson as plain). Any corrosion protection needed is set by the project specification.

Shear studs in Adelaide

Allmat supplies shear connector studs, ceramic ferrules, reduced base arc studs and structural bolts to steel fabricators, stud welding contractors and builders across Adelaide and South Australia. Add them to a quote with the rest of your list and we will price the lot.

Shear studs and ceramic ferrules

Shear connector studs, ceramic ferrules, reduced base arc studs and structural bolts are available to order from Allmat for steel fabricators, stud welding contractors, builders and trade across Adelaide and South Australia. Order through Allmat, we pick and pack it, then click and collect from the Allmat yard or have it delivered to site.

Send your list for a quote Call 1300 03 03 63

Goes with

Questions

What are shear studs used for?

They are welded to steel beams and cast into the concrete slab to connect the two, so the steel and concrete act together as a composite structure. Hobson lists bridges, industrial structures and high-rise buildings.

What sizes of shear studs do you have?

16mm diameter from 75 to 150mm long, 19mm from 75 to 250mm, and 22mm from 100 to 250mm. The 16 and 19mm studs have a 32mm head, the 22mm studs a 35mm head.

Do shear studs come with ferrules?

No, ceramic ferrules are sold separately in packs of 100. Use the DF thru-deck ferrule when welding through steel decking and the UF clean beam ferrule when welding straight onto the beam, in the same diameter as the stud.

What load can a shear stud take?

Hobson publishes no shear capacities for these studs. The size, number and spacing of studs, and the welding, come from the structural engineer's design and the welding specification.

What standard are the shear studs made to?

Hobson lists the shear connector studs, reduced base arc studs and ceramic ferrules against AS 1554.2. Test certificates for the shear studs can be downloaded from Hobson's website.

What is a reduced base arc stud?

A threaded class 4.8 weld stud with a base narrower than the thread, so the thread diameter exceeds the weld fillet. It has a flux ball to stabilise the arc and is about 3 to 4mm longer before welding. Use the RF ceramic ferrule.

Where can I buy shear studs in Adelaide?

Order through Allmat. Order ahead by phone on 1300 03 03 63 or send your list for a quote, then click and collect from 25 Kapara Road, Gillman, or have them delivered to site.

Shear Connector Stud: sizes and finishes we supply

35 lines by type and finish. Pick one above for its product code, pack sizes and dimensions.

Type	Finish	Sizes	Lengths	Lines
Shear connector stud	Steel	16, 19, 22	75 to 250 (10 lengths)	20
Reduced base arc stud	Steel	M16, M20	40, 50, 55, 60, 65, 75	7
Ceramic ferrule, THRU-DECK	Ceramic	16, 19, 22	-	3
Ceramic ferrule, clean beam	Ceramic	16, 19, 22	-	3
Ceramic ferrule, reduced base stud	Ceramic	16, 20	-	2

Data sheets and documents

The documents for the product you choose are listed with the selector above. Here is every Shear Connector Stud document from Hobson Engineering.

All Shear Connector Stud documents (5)

Data sheets and technical data (1)

Product Finish Comparison

Did You Know flyers (3)

Guides and articles (1)

Conxtruct Product Guide

Need them in bulk?

Add the sizes you need to your quote, or send us your list and we’ll price the lot and supply it with the rest of your order.

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