EXPANDED MESH

Specifications & Details
Materials: Mild Steel (untreated), black, or galvanised
Sheet Dimensions: 1200 mm x 2400 mm (can be LWM x SWM or SWM x LWM)
Common Uses: Fencing, screens, guards, ventilation panels, walkways, trailer floors, cages, and architectural applications.
Features: High strength-to-weight ratio; no loose strands or welds; good anti-slip surface.

In the context of expanded metal mesh, LWM and SWM describe the orientation and size of the diamond pattern openings. 

Definitions
LWM (Long Way of Mesh): The distance from the centre of one "knuckle" (the intersection of two strands) to the centre of the next knuckle across the longer diagonal of the diamond.
SWM (Short Way of Mesh): The distance from the centre of one knuckle to the centre of the next knuckle across the shorter diagonal of the diamond. 

Why Orientation Matters
The orientation of these diamonds relative to the sheet dimensions (1200 x 2400) affects both the appearance and the mechanical properties: 
Strength & Walkways: For walkway applications, load-bearing capacity is typically higher when spanning the LWM direction. Additionally, grip is strongest when the diamonds run left-to-right underfoot.
Security & Fencing: In fencing, panels are often mounted with the diamonds pointing longways toward the sky (LWM vertical) to create narrower openings that are harder to climb.
Aesthetics: If you are matching existing mesh, you must ensure the diamond orientation (e.g., LWM running parallel to the 2400 mm side) is consistent.