Learn the standard formulas for open area percentage of staggered, straight, and square hole perforations and use Mutual Metal’s Engineering & Calculations tool for quick results.
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Category: Calculation & Engineering Guides
How to Calculate Perforated Metal Open Area
Learn the standard formula for determining open‑area percentage of perforated metal using hole size, pitch and pattern, with step‑by‑step examples for round and square holes.
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How to Calculate Perforated Metal Weight
Learn the step‑by‑step method for estimating the weight of perforated metal sheets using dimensions, material density, thickness, and open‑area percentage.
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How Expanded Metal Weight Is Calculated
Learn the precise method for estimating expanded metal weight using sheet dimensions, strand thickness, material density, and open‑area percentage—essential knowledge for engineers and procurement specialists.
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How to Estimate Bar Grating Load Requirements
Learn the key factors—span, bearing bar depth, spacing, and load type—used to calculate bar grating load capacity per NAAMM MBG‑531, with a disclaimer to consult a licensed structural engineer.
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How Bar Grating Bearing Bar Size Affects Load Capacity
Understanding how bearing bar depth, thickness, spacing, and span influence the load‑carrying capacity of bar grating, with guidance from NAAMM MBG‑531.
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Understanding SWD and LWD in Expanded Metal
Learn the technical differences between Short Way of Design (SWD) and Long Way of Design (LWD) expanded metal, and how each geometry impacts strength, aesthetics, and ideal applications for engineers and architects.
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