Span tables for these beams provide ratings for spacings of 12”, 16”, 19 3/16”, and 24”. Because these beams can support more weight than their dimensional lumber counterpart, they often have different spacing requirements. The diamond marks on tape rule blades are for spacing these engineered floor joists in new construction. The black diamonds which appear every 19 3/16” on metal tape measures are for spacing I-beam “timbers.” Several wood-product manufacturers offer I-beam “timbers” as a substitute for solid lumber floor joists. This curve allows the blade to “stand out” while measuring, helping you read the measurement. Have you ever wondered why the blade on a tape measure is curved? The concave design helps keep the blade rigid when extended. Here are a few hidden features you will find within your tape measure. After all, a measuring tape is a simple device with a simple – although important – purpose: to measure things.īut there’s more to this tool than meets the eye. Are you getting the most out of your tape measure?
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