What grade is your SHS?

All our SHS is C350L0 to AS/NZS 1163. That's the standard structural grade in Australia — 350 MPa minimum yield, suitable for engineered work, weldable, and stamped where required.

Do you carry galvanised SHS?

Yes — both DuraGal (in-line galv with a clear coat) in the popular sizes, and we send larger jobs out for hot-dip galv after fabrication. Tell us what the job is and we'll point you at the right finish.

Can you cut SHS to length?

Yes. Cut-to-length is a standard service at the yard — send through a cut list and we'll have it ready to pick up or load on the truck.

What's the smallest SHS you stock?

20 × 20 × 1.6 wall. Below that you're into RHS strap or flat bar territory — happy to help work out what suits.

Do you deliver SHS to the Gold Coast, Tweed Heads and Northern NSW?

Yes — we deliver SHS across the Gold Coast, Tweed Heads and Northern NSW. The crane truck handles full 7.5m bundles onto site.

What's the longest SHS you can supply?

Standard stock length is 7.5m off the rack. Longer mill lengths up to 12m are on special order — tell us the section and we'll quote the lead time.

Can you fabricate from SHS?

Yes — drilling, coping, hole-punching and welding from SHS is part of our fabrication service. Send a sketch or drawing and we'll quote the finished part.

How much does SHS cost on the Gold Coast?

Price depends on the size, wall thickness, finish and length. Send us a quick list and we'll quote it same day from Burleigh Heads.

PRODUCTS / Square Hollow Sections

Square Hollow Sections (SHS)

SHS (square hollow section) is square steel tube to AS/NZS 1163, used for posts, frames and light structural work across the Gold Coast.

Sizes

20×20 to 250×250

Finishes

Painted · Galv · DuraGal

Lengths

6.5m or 8.0m

Cut to length

On request

SHS is the workhorse of Gold Coast steelwork. It's a square tube — strong every way you turn it, easy to weld, easy to bolt, and it looks tidy under paint or powder coat. We stock it from light 20×20 hobby sizes right up to heavy 250×250 structural posts.

Around here it ends up in everything: patio posts, carports, pergolas, sheds, gate frames, balustrades and light commercial framing. Builders take it home in their utes, fabricators order pallet lots, owner-builders walk in with a sketch on a beer coaster — all of it's fine with us.

Walk into the yard at Burleigh Heads and have a look, or send us a list — we'll quote it the same day.

Common applications

What it's used for.

Patio and pergola posts
Carport and shed frames
Gate and fence frames
Balustrade uprights
Mezzanine and stair stringers
Light structural posts and beams
Trailer and machinery framing

Sizes we carry

Standard SHS sizes — pulled straight from the rack.

marks the sizes we move most often. Other sizes available on request.

See full size reference → for every standard section we stock.

Stock varies by size. Call us before you drive to confirm what's on the shelf today.

Painted finish is generally Blue. Larger box sections may be Black mill finish, but Blue is the standard for all Painted stock.

Standard SHS sizes per AS/NZS 1163, Grade C350L0. Stocked items vary — call us for what's on the shelf.

Marshall Steel — Square Hollow Sections (SHS)

Standard SHS sizes per AS/NZS 1163, Grade C350L0. Stocked items vary — call us for what's on the shelf. · 9 Stevenson Court, Burleigh Heads QLD · 07 5576 6037

Size (mm)	Wall thickness (mm)	Mass (kg/m)	Standard length (m)
13 × 13	1.6	0.56	6.5
13 × 13	1.8	0.63	6.5
16 × 16	1.6	0.72	6.5
16 × 16	2.0	0.88	6.5
20 × 20	1.6	0.92	6.5
20 × 20	2.0	1.13	6.5
20 × 20	2.5	1.36	6.5
25 × 25	1.6	1.18	6.5
25 × 25	2.0	1.44	6.5
25 × 25	2.5	1.77	6.5
25 × 25	3.0	2.07	6.5
30 × 30	1.6	1.43	8.0
30 × 30	2.0	1.76	8.0
30 × 30	2.5	2.16	8.0
30 × 30	3.0	2.55	8.0
35 × 35	1.6	1.68	8.0
35 × 35	2.0	2.07	8.0
35 × 35	2.5	2.55	8.0
35 × 35	3.0	3.02	8.0
40 × 40	1.6	1.93	8.0
40 × 40	2.0	2.39	8.0
40 × 40	2.5	2.94	8.0
40 × 40	3.0	3.49	8.0
40 × 40	4.0	4.52	8.0
50 × 50	1.6	2.43	8.0
50 × 50	2.0	3.01	8.0
50 × 50	2.5	3.73	8.0
50 × 50	3.0	4.43	8.0
50 × 50	4.0	5.78	8.0
50 × 50	5.0	7.06	8.0
50 × 50	6.0	8.29	8.0
65 × 65	2.0	3.96	8.0
65 × 65	2.5	4.91	8.0
65 × 65	3.0	5.84	8.0
65 × 65	4.0	7.66	8.0
65 × 65	5.0	9.42	8.0
65 × 65	6.0	11.1	8.0
75 × 75	2.0	4.58	8.0
75 × 75	2.5	5.69	8.0
75 × 75	3.0	6.78	8.0
75 × 75	4.0	8.92	8.0
75 × 75	5.0	11.0	8.0
75 × 75	6.0	13.0	8.0
89 × 89	3.5	9.40	8.0
89 × 89	4.0	10.6	8.0
89 × 89	5.0	13.2	8.0
89 × 89	6.0	15.6	8.0
100 × 100	3.0	9.14	8.0
100 × 100	3.5	10.6	8.0
100 × 100	4.0	12.1	8.0
100 × 100	5.0	14.9	8.0
100 × 100	6.0	17.7	8.0
100 × 100	8.0	23.1	8.0
100 × 100	9.0	25.7	8.0
125 × 125	4.0	15.2	8.0
125 × 125	5.0	18.8	8.0
125 × 125	6.0	22.4	8.0
125 × 125	8.0	29.4	8.0
125 × 125	9.0	32.8	8.0
150 × 150	5.0	22.8	8.0
150 × 150	6.0	27.1	8.0
150 × 150	8.0	35.7	8.0
150 × 150	9.0	39.8	8.0
150 × 150	10.0	44.0	8.0
200 × 200	5.0	30.6	8.0
200 × 200	6.0	36.5	8.0
200 × 200	8.0	48.2	8.0
200 × 200	9.0	54.0	8.0
200 × 200	10.0	59.7	8.0
200 × 200	12.5	73.6	8.0
250 × 250	6.0	46.0	8.0
250 × 250	8.0	60.8	8.0
250 × 250	9.0	68.1	8.0
250 × 250	10.0	75.4	8.0
250 × 250	12.5	93.2	8.0

Extended lengths (9m / 10m / 12m) available in select sizes and finishes — contact us to confirm stock.

Got your size? Get a quote.

Quote my SHS

Yellow-dot sizes are typical stock at the Burleigh Heads yard. Other sizes available on request — usually same-week.

Steel weight calculator

Roughly how much will your steel weigh? Get a quick estimate before you call.

Size (mm)Wall thickness (mm)Length

Quantity

Cross-section (mm²)

1,136

Mass per metre (kg/m)

8.92

Per piece (kg)

53.51

Total mass (kg)

53.51

Estimate only — based on nominal sizes and 7850 kg/m³ density. Actual mass varies by 2–3% with manufacturing tolerances. Call us for exact spec.

Finishes

How we finish it.

Painted black is what most jobs run on. Hot-dip galv is the go for outdoor and coastal — the salt air down the strip eats unprotected steel. DuraGal is in-line galvanised tube with a clear organic coating, neat finish, paints up nicely.

Painted black mild steel
Hot-dipped galvanised (after fabrication, to AS/NZS 4680)
DuraGal — in-line galv with clear coat
Primed

All SHS to AS/NZS 1163, Grade C350L0 typical.

Cut to length & fabricated on site.

We cut SHS to your sizes on the bandsaw and fabricate from this range in the workshop — drilling, coping, welding, hole-punching. See the fabrication service →

FAQ

Common questions on SHS.

What grade is your SHS?: All our SHS is C350L0 to AS/NZS 1163. That's the standard structural grade in Australia — 350 MPa minimum yield, suitable for engineered work, weldable, and stamped where required.
Do you carry galvanised SHS?: Yes — both DuraGal (in-line galv with a clear coat) in the popular sizes, and we send larger jobs out for hot-dip galv after fabrication. Tell us what the job is and we'll point you at the right finish.
Can you cut SHS to length?: Yes. Cut-to-length is a standard service at the yard — send through a cut list and we'll have it ready to pick up or load on the truck.
What's the smallest SHS you stock?: 20 × 20 × 1.6 wall. Below that you're into RHS strap or flat bar territory — happy to help work out what suits.
Do you deliver SHS to the Gold Coast, Tweed Heads and Northern NSW?: Yes — we deliver SHS across the Gold Coast, Tweed Heads and Northern NSW. The crane truck handles full 7.5m bundles onto site.
What's the longest SHS you can supply?: Standard stock length is 7.5m off the rack. Longer mill lengths up to 12m are on special order — tell us the section and we'll quote the lead time.
Can you fabricate from SHS?: Yes — drilling, coping, hole-punching and welding from SHS is part of our fabrication service. Send a sketch or drawing and we'll quote the finished part.
How much does SHS cost on the Gold Coast?: Price depends on the size, wall thickness, finish and length. Send us a quick list and we'll quote it same day from Burleigh Heads.