A span options calculator allows selection of multiple species and grades for comparison purposes. Joists and rafter spans for common loading conditions can be determined. Our VERSA-LAM ® LVL is manufactured in either Alexandria (Lena), Louisiana in Eastern United States, or in White City, Oregon for the Western United States. Performs calculations for ALL species and grades of commercially available softwood and hardwood lumber as found in the NDS 2018 Supplement. VERSA-LAM ® laminated veneer lumber (LVL) beams and headers eliminate twisting, shrinking and splitting, and deliver flatter, quieter floors and structures. Special Engineering Note: Open Joist trusses may be manufactured with components that provide increased structural values that may exceed the performance levels indicated in these charts. Straight-line interpolation shall be permitted for intermediate spans and design values. ENGINEERED WOOD PRODUCTS (EWP) LVL SPAN AND SIZE CHARTS.NOTE: Clear spans shown on this chart are presented under the following conditions: (1) Bearing size varies and is determined by loading conditions, truss span and truss spacing (2) "Strongback" bracing is not considered (3) Assumes composite action with a single layer of 3/4" wood sheathing glued and nailed or screwed (4) Spans are clear distance between supports for uniformly loaded trusses and include allowable increases for repetitive use members.To find maximum clear span for a given truss depth in a given loading condition, refer to the bottom line of spans shown for that particular truss depth. Maximum spans published on the chart above may be limited by standard joist configuration. * Because OPEN JOIST is a "stock" product, the length of an OPEN JOIST truss determines the size and grade of the truss' chords (see table below).View details on fire resistance assemblies for one and two hour endurance.2 Stress grade, and wet service conditions.9-1/4" Depth Maximum Live Load Deflection (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ1-1/4" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ1-7/8" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ4" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ6" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ8" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)Ģ0" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End) UDC Floor & Ceiling Joist and Roof Rafter Span Tables. By specifying Northbeam 7.2m lengths, rafter spans may be increased by 10 for rafters continuous. Rafter to plate, toe nail (maximum 6 rafter span, engineered. Note: The span chart below is an example of how spans charts are presented. Because building code and lumber spans are updated from time to time, you should always check to make sure the span chart you are using is up to date. See the applicable code section, or the NDS to confirm the span chart you are using is correct.ĭimensional Lumber Deck Beam Spans Supporting a Single Span of Joists with or without Overhangs:Īssumes 40 psf live load, 10 psf dead load, L/360 simple span beam deflection limit, cantilever length L/180 deflection limit, No. Headers & Beams : Allowable Load Tables Tables listing Maximum Spans for Southern Pine joists and rafters are detailed below. (4) Rafter spacing of 1200 mm does not include heavy roofs. The longer the joist, the more area of deck the joist supports, and thus the beam supports more area as well. In addition, many residents prefer the fell of a deck that is designed for higher loads. Building codes for residential decks only require 40 psf in some areas, but check your local requirements to make sure you are aware of any additional local guidelines. Beam span maximums are based on a maximum anticipated live load as well as other factors. Fewer posts on upper-level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans. The span of a beam is dependent on a few variables: The grade and species of lumber, size of lumber and the load it carries. The American Wood Council (AWC) Span Calculator for Wood Joists and Rafters (Span Calc) performs calculations for all species and grades of commercially.
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