How to Measure Expanded Metal Mesh | SWD, LWD, Strand Width Guide

Expanded metal mesh is defined by both opening size and material dimensions. If even one item is measured the wrong way, the final specification can point to a different mesh pattern, sheet weight, or open area.

SWD The short way of diamond, measured across the narrow direction of the opening.

LWD The long way of diamond, measured in the expanded direction of the opening.

Strand Width The width of the metal strand between the openings.

Thickness The base metal thickness, which should be confirmed as raised or flattened.

Measurement Diagram

Expanded metal mesh specifications diagram showing TL short way, TB long way, plate thickness, strand width, sheet width, and sheet length

How to Measure Step by Step

Measure SWD

Measure the clear opening across the short direction of the diamond. This is normally the smaller opening value.

Measure LWD

Measure the clear opening across the long direction of the diamond. This is the longer dimension of the mesh opening.

Measure Strand Width

Measure one strand from edge to edge, not including the opening. This value directly affects strength and weight.

Measure Thickness and Sheet Size

Confirm the base material thickness, then record overall sheet width and length. Also note whether the mesh is raised or flattened.

Specification Checklist

Item	What to confirm
Material	Steel, aluminum, stainless steel, titanium, or other alloy.
Mesh Type	Raised expanded metal or flattened expanded metal.
SWD	Short way of diamond opening.
LWD	Long way of diamond opening.
Strand Width	Width of the strand between the openings.
Thickness	Base sheet thickness before expansion.
Sheet Size	Overall sheet width and overall sheet length.
Finish	Mill finish, galvanized, anodized, powder coated, or custom finish.

Common Mistakes to Avoid

Mixing inside opening size with center-to-center pitch.
Using overall thickness when the supplier needs base metal thickness.
Not stating whether the mesh is raised or flattened.
Sending only SWD and LWD without strand width or thickness.

FAQ

What is SWD in expanded metal mesh?

SWD means Short Way of Diamond. It is the shorter opening dimension across the diamond pattern.

What is LWD in expanded metal mesh?

LWD means Long Way of Diamond. It is the longer opening dimension measured along the expanded direction.

Should thickness be measured on raised mesh or flattened mesh?

You should confirm the base material thickness and clearly state whether the finished mesh is raised or flattened, because the surface profile changes the final shape.

What should I send for an accurate quotation?

Send material, mesh type, SWD, LWD, strand width, thickness, sheet width, sheet length, and any finish requirement.

Need help confirming your mesh specification?

Share your drawing, sample, or target dimensions and YueChu Metal can help check the correct expanded metal mesh specification before quotation.