Metal notes
Practical articles for buyers comparing mesh, perforated metal, grating, and structural steel choices.
A quality compliance manager answers the questions contractors and project owners actually ask about steel buildings—from sports venues and warehouses to truss bridges and multi-storey structures. No sales pitch, just what the specs and inspections taught me.
Measure hole arrangement, gauge, and open area on incoming McNichols perforated panels so you order, form, and inspect the right sheet before it reaches the brake.
Which McNICHOLS expanded metal to order — raised or flattened — and which alloy: flattening halves panel thickness, and caliper numbers settle it.
For McNichols expanded metal mesh, the grade fork decides more than aperture: resolve aluminum vs stainless first, then gauge band, then mesh dimensions.
How to read a bar grating load table: why deflection, not stress, usually sets the allowable load, and how material choice changes the row you spec.
Selecting expanded metal mesh: fix forming and load path first, then alloy, then 304 vs 316 chloride logic and connection vetoes before quoting.
Round perforated metal is more than a pattern; the alloy determines coastal survival. This case study shows when to spec 3003, 5052, or 316.
Choose 316 over 304 in chloride service; match aluminum alloy to corrosion and load; match copper grade to use. A wrong pick can turn $12,000 saved into $47,000 lost.
Fix the environment, then the alloy or grade, then open area and thickness — a decision order for perforated panels that survives coastal and wash-down service.
Choosing expanded metal mesh comes down to material: 316 for chloride or marine exposure, 304 for dry indoor sites, aluminum when weight matters.