A Comparison of Steel Beams & Microlam Beams

Microllam brand laminated veneer lumber (LVL) is constructed from thin layers of wood veneer glued together. It is similar in construction to plywood, but the wood grain runs parallel in all the layers of veneer.

  1. Microllam

    • Microllam is typically milled in planks 1¼ inches wide, making it a good choice for beams spanning up to 16 feet. Widths between 3½ inches and 5½ inches are also available and depths range up to 20 inches.

    Steel

    • Steel beams are much stronger than Microllam and other engineered wood beams of the same dimensions. Rolled or extruded steel I-beams -- whose cross section resembles an uppercase letter "I" -- are typically used in residential applications; they are available in widths and depths between 4 inches and 10 inches and standard lengths of 20 feet and 40 feet.

    Considerations

    • One of the disadvantages of Microllam is that it is not pressure-treated, so it cannot be used for exterior beams. Microllam is, however, much lighter than steel -- a 20-foot, 8-inch by 4-inch steel I-beam can weigh 300 lbs. -- and much less expensive.

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