Walkway Mesh and Catwalk Grating

Used for: Catwalks, rooftop and M&E maintenance walkways, service platforms, mezzanines, drain gratings
Products: Walkway mesh W50-075, W50-080 and W50-110
Metal: Mild steel, hot dip galvanised as standard. Stainless SS304 or SS316 and aluminium on request
Sheet size: 4FT x 8FT (1.22m x 2.44m), or cut to your frame up to 1.5m x 3m

Which walkway mesh do I need?

All three are expanded steel walkway mesh with raised strands. The opening size and the strand width set how much load each one carries and how much water, air and light passes through.

If you need	Choose	Why
A closer walking surface where small items and fine debris must not drop through	W50-075	Smallest opening of the three (30mm x 75mm), 23 kg/m², 5.70 kN/m² over a 600mm simple span
Everyday walkways, drain gratings and stair treads, where drainage, airflow and a light frame load matter	W50-080	Our most popular walkway mesh. The most open (78.8% open area) and the lightest (14.05 kg/m²) of the three, 4.80 kN/m² over 600mm
The most load per span, with a large opening for drainage	W50-110	Wider 11mm strands give the highest load of the three, 6.30 kN/m² over 600mm. 45mm x 135mm opening, 19 kg/m²

What to tell us for a quote

What goes on it. People only, people carrying tools, or trolleys and equipment.
The span. The distance between the supports under the mesh. This matters more than anything else: W50-075 carries 5.70 kN/m² over a 600mm simple span and 1.50 kN/m² over 1200mm.
Where it is. Indoors, outdoors, on a roof, or near the sea. This decides galvanised, stainless or aluminium.
Panel sizes. A drawing, a sketch with dimensions, or the frame spacing. We cut to size.

Send it on WhatsApp and the price comes back the same day.

Walkway Mesh Load/Span Table

Maximum uniform and point loads for the walkway range by span type and span length, from the Supply Bay 2026 catalogue.

Model	Load type	Simple span (mm)			Double span (mm)			Triple span (mm)
Model	Load type	600	900	1200	300	450	600	200	300	400
W30080	Uniform (kN/m²)	Not recommended			7.25	2.61	1.82	19.13	8.50	4.78
W30080	Point (kN)	Not recommended			1.32	0.53	0.44	1.43	0.96	0.72
W50075	Uniform (kN/m²)	5.70	2.50	1.50	23.50	10.70	6.00	51.00	25.00	14.00
W50075	Point (kN)	1.30	0.80	0.60	2.80	1.90	1.40	4.40	3.00	2.20
W50080	Uniform (kN/m²)	4.80	2.20	1.20	20.00	9.00	5.10	43.00	21.00	12.00
W50080	Point (kN)	1.10	0.74	0.54	2.50	1.68	1.27	4.00	2.68	2.04
W50105	Uniform (kN/m²)	8.20	3.65	2.02	33.80	15.30	8.66	70.00	36.10	20.50
W50105	Point (kN)	1.80	1.22	0.92	4.20	2.80	2.12	6.40	4.56	3.45
W50110	Uniform (kN/m²)	6.30	2.90	1.70	26.00	11.70	6.70	55.00	28.20	16.00
W50110	Point (kN)	1.44	0.96	0.70	3.30	2.20	1.68	5.00	3.56	2.70

The load/span table is only a guide. Load capacities are based on mesh spanning in the Long Way Mesh (LWM) direction, with minimum 25mm end bearing and spot welding at every fourth strand. Values reflect the maximum loads without permanent deformation, incorporating a 1.4x safety factor. If some deformation is acceptable, loads may increase by up to 40%. Recommended spans assume deflection does not exceed span/200. Spans listed are nominal; deduct 25mm at each end for clear span. Always confirm the full assembly with your structural engineer.

Galvanised, stainless or aluminium?

Hot dip galvanised mild steel is the standard for most Singapore walkways, outdoor and industrial. The zinc coating protects the steel and tolerates minor surface damage.
SS304 stainless suits indoor walkways and areas that are washed down often, such as food processing.
SS316 stainless is the grade for waterfront, coastal and salt air sites, and heavy chemical exposure.
Aluminium is for rooftops and structures where every kilogram on the frame counts.

Why expanded metal and not bar grating or chequer plate

Expanded metal is slit and stretched from one solid sheet, so there are no welds to crack under vibration or rust at the joints. It spreads load in every direction, the raised strands grip safety boots in the wet, and water and debris drop through instead of pooling. Chequer plate is solid, so water sits on it and it stays slippery. Bar grating carries very heavy loads but only in one direction, and its welded joints are where corrosion starts.

Frequently asked questions

What is walkway mesh?

Walkway mesh is expanded metal made from heavier gauge steel plate, slit and stretched into a raised diamond pattern. It is fixed onto a supporting steel frame for catwalks, platforms, maintenance walkways and drain gratings, and the open pattern lets water, debris and light pass through.

How much load can walkway mesh take?

It depends on the model, the span between supports and the frame. As a guide, W50-075 over a 600mm simple span takes 5.70 kN/m² uniform load or a 1.30 kN point load; over 1200mm it takes 1.50 kN/m². The full load and span table is on this page. Always confirm the full assembly with your structural engineer.

Which way should walkway mesh span?

Our load figures assume the mesh spans in the long way of mesh (LWM) direction, with at least 25mm end bearing and spot welding at every fourth strand. Spans are nominal, so deduct 25mm at each end for the clear span.

Is walkway mesh slippery when wet?

The strands of walkway mesh sit raised above the plane of the sheet, which gives grip underfoot, and water drains straight through the openings instead of pooling on the surface.

Can you cut walkway mesh to size?

Yes. Standard sheets are 4FT x 8FT (1.22m x 2.44m) and we cut to your frame, with custom sizes up to 1.5m x 3m. Delivery is 7 to 14 days, faster for stock items.