3100Fb-2.0E 3 WEST FRASERLVL FACTORED RESISTANCES (STANDARD TERM) Design Property Depth 1. LVL beam thickness is usually between 1-3/4 (one ply) and 7 inches (4ply). Generally, you can find LVL beams in a 4-foot increments starting at 24 feet and going up to 44 feet long, with special customize size up to 60 feet. All 16 and greater beam depths are to be used in multiple member units only. An LVL beam can span up to 60 feet due to its strength and is much stronger than traditional lumber. Numerous factors – such as the area’s humidity, weather conditions and even average snowfall – can have a large effect on an LVL beam’s maximum span size. Lateral support of beam is required at bearing locations.
Keep in mind that values given by an LVL span size chart are approximate. This span size only applies to single floors floors supporting additional stories or roofs require sturdier construction and use different LVL span size charts. For example, you can span a 1 grade (no knots) southern yellow pine joist a greater distance than a 2 grade of the same species (with knots). For example, if you are using an LVL beam with two plies of 16 inches or three plies of 14 inches with the columns spaced 14 feet from one another, the maximum span size is 36 feet. Considerations when using the Rafter and Joist Span Tables The lengths and sizes of joists vary depending on the species and quality of the lumber used. Then match these figures with the appropriate maximum span size. Use an LVL span size chart for a single floor by finding the size range of LVL beams you are using and the space between the floor’s support columns. Because these floors support the lightest loads, they require the fewest support columns and the smallest LVL beams. Common single floors include second-story floors or floors over a basement. The simplest type of LVL-based floor is a single floor that does not support an additional load.
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