CHAPTER 5: Design of Wood Framing
Chapter 5 - Design of Wood Framing 5.2.1 Lumber General As with all materials, the designer must consider wood’s strengths and weaknesses. A comprehensive source of technical information on wood characteristics is the Wood Engineering Handbook, Second Edition (Forest Products Laboratory, 1990). For the most part, the knowledge embodied in the
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2. Wood-frame or glued laminated arches for roof con-struction which spring from the top of walls or wall abutments, sawn timber trusses and other roof framing which do not support floor loads, shall have members not less than 4 inches, nominal, in width and not less than 6 inches, nominal, in depth. Spaced members may be composed of two or more
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· Aluminium composite decking panels which contain wooden starch and plastic (polypropylene). This material is well-established in practice as it looks stylish – it’s not easy to distinguish between composite and natural wood at first sight. This is due to the fact that the better part of the composite …
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The spacing of floor trusses allows for maximum structural efficiency and speed of installation. Stiffness and strength can be designed into the floor truss, creating a more solid floor. Special bearing, cantilever and balcony details are easily built in. Shrinkage, warping or twisting are minimized.
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· Floor trusses should never be cut, drilled, or have connector plates removed. 4. Increasing the Span. An increase may be accomplished by placing an additional timber to the ends of the floor truss. This solution is suitable only for small extensions. The timbers must be attached vertically to the end of the truss, one timber …
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TIMBER BEAM DESIGN SEISMIC FORCES/WIND FORCES FLOOR SHEARWALL DIAGRAM LATERAL LOADS ... Truss Joist – MacMillan, 2.0E Parallam PSL MICROLLAM BEAM: Truss Joist – MacMillan, 1.9E ... strength given in the NDS and wood structural panel design properties given in the APA/PDS. 2306.4.2Lumbersheathedshearwalls.
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Floor Truss Span Chart Each individual floor truss design is unique based on multiple variables: geometry, loading, spacing, bearing conditions, etc. Span Tables below illustrate common combinations of the multiple variables available. TCLL = 40 psf TCLL = 80 psf TCLL = 125 psf Truss Spacing Truss Spacing Truss Spacing
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Composite deck 2 inch nominal depth, 36 inch coverage 7 foot to 12 foot Optimal Span Range No Acustadek® Option Least steel weight per square foot floor deck Meets SDI 2x12 inch standard profile requirements Reduced composite slab depth compared to 3WxH and NH Composite deck 2 inch nominal depth, 36 inch coverage
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Floor Truss Span Tables Alpine Engineered Products 17 These allowable spans are based on NDS 91. Maximum deflection is limited by L/360 or L/480 under live load. Basic Lumber Design Values are F =2000 psi F =1100 psi F =2000 psi E=1,800,000 psi Duration Of Load = 1.00. Spacing of trusses are center to center (in inches). Top Chord
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· Two types of engineered joists are most frequently used in floor systems today: Wood I-Joists with dimension lumber top and bottom chords and OSB web. Open web trusses with wood webbing held together with metal plates. I-joists have major advantages in high-volume construction with standard layouts. This is because they are less expensive.
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Open Web Wood Floor Trusses 4 X 2 Floor Truss Systems are custom built pre-fabricated floor components that have been used in Canada for over 30 years. Regions such as Lethbridge, AB have been using the floor truss for many years with an estimated 75% of residential
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· Trusses are beneficial in that the open spaces in the middle make it easy to run utilities through them. While they flex more than I-joists, they flex less than lumber trusses and use less wood. Due to their unique design, web trusses can stretch the greatest span of all joists.
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What's the difference between Joist and Truss? Joists are used in floors and as column support. The joist (also called Bandsill) supports the load which the floor is built to bear. It is like the skeleton a building. Trusses are of many types; the simplest is a planar truss which is used as a roof supp...
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· Composite Decks . Gaining in popularity are composite decking materials, composed primarily of a mix of recycled plastic and wood fibers. While a deck built with these materials is clearly not "natural" and won't have the potential beauty of a real-wood deck…
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RedBuilt trusses:Built for freedom. In the late 1950’s, RedBuilt’s founders invented an innovative composite steel and engineered wood open-web truss. Since then, this design solution for architects and engineers has evolved to support large floor areas …
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Floor trusses are highly engineered and dependable structures, but many builders don’t realize they also help to eliminate costly materials and maximize design freedom. They have more variety in end conditions than dimensional lumber or I-joists and can be engineered to accommodate design details that benefit the homeowner – like higher ceilings, fewer soffits, and balconies.
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· Fires in wooden homes are not a major problem now that smoking is outlawed and we use electricity for heating and cooking. Wood has a quality that makes even old furniture look stylish and hey – we have homes built in the 1940s ’50s and 60’s which are popular nearly 100 years later because of these beautiful intact wood floors.
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· Composite Decks . Gaining in popularity are composite decking materials, composed primarily of a mix of recycled plastic and wood fibers. While a deck built with these materials is clearly not "natural" and won't have the potential beauty of a real-wood deck…
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· The battle between wood and composite decking materials has been going on for decades with mixed results. While wood decks were clearly winning the bids until some ten years ago, the composite decking materials improved immensely in terms of structure, durability and safety. Nowadays, the choice between …
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TIMBER BEAM DESIGN SEISMIC FORCES/WIND FORCES FLOOR SHEARWALL DIAGRAM LATERAL LOADS ... Truss Joist – MacMillan, 2.0E Parallam PSL MICROLLAM BEAM: Truss Joist – MacMillan, 1.9E ... strength given in the NDS and wood structural panel design properties given in the APA/PDS. 2306.4.2Lumbersheathedshearwalls.
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· Floor trusses should never be cut, drilled, or have connector plates removed. 4. Increasing the Span. An increase may be accomplished by placing an additional timber to the ends of the floor truss. This solution is suitable only for small extensions. The timbers must be attached vertically to the end of the truss, one timber …
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Floor trusses are highly engineered and dependable structures, but many builders don’t realize they also help to eliminate costly materials and maximize design freedom. They have more variety in end conditions than dimensional lumber or I-joists and can be engineered to accommodate design details that benefit the homeowner – like higher ceilings, fewer soffits, and balconies.
Get priceCHAPTER 5: Design of Wood Framing
Chapter 5 - Design of Wood Framing 5.2.1 Lumber General As with all materials, the designer must consider wood’s strengths and weaknesses. A comprehensive source of technical information on wood characteristics is the Wood Engineering Handbook, Second Edition (Forest Products Laboratory, 1990). For the most part, the knowledge embodied in the
Get priceHybrid Wood and Steel Details– Builder’s Guide
Hybrid Wood and Steel Details–Builder’s Guide Preface The NAHB Research Center, the U.S. Department of Housing and Urban Development (HUD), and the Steel Framing Alliance have worked cooperatively to introduce cold-formed
Get priceEngineered Floor Joists: Which Are Best For Your ...
· Engineered Wood Floor Systems. Nowadays however, engineered wood floor systems are undergoing rapid market growth due to their many advantages over traditional wood. Engineered wood is more sustainable, using less trees and costs less to use per square foot. It weighs less and is easier to handle, saving time and money on construction sites.
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Floor Trusses. Floor trusses are the solution to many floor framing problems. Architects, engineers and contractors are using floor trusses to create high quality, squeak-free construction with the added benefits of reduced framing time, waste, and callbacks. Design versatility and the open space provided between the chords and webs of floor ...
Get priceHybrid Wood and Steel Details– Builder’s Guide
Hybrid Wood and Steel Details–Builder’s Guide Preface The NAHB Research Center, the U.S. Department of Housing and Urban Development (HUD), and the Steel Framing Alliance have worked cooperatively to introduce cold-formed
Get priceJoist vs Truss
What's the difference between Joist and Truss? Joists are used in floors and as column support. The joist (also called Bandsill) supports the load which the floor is built to bear. It is like the skeleton a building. Trusses are of many types; the simplest is a planar truss which is used as a roof supp...
Get priceTypical Wood Truss Configurations
Typical Wood Truss Configurations Wood trusses are pre-built components that webs and length of spans will vary according to ... The wood truss configurations for the actual truss design. illustrated on this chart are a representative sampling. The ... Floor Truss (System 42 - Modified Warren Configuration) Mono Trusses Scissors Mono
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Floor Truss Span Tables Alpine Engineered Products 17 These allowable spans are based on NDS 91. Maximum deflection is limited by L/360 or L/480 under live load. Basic Lumber Design Values are F =2000 psi F =1100 psi F =2000 psi E=1,800,000 psi Duration Of Load = 1.00. Spacing of trusses are center to center (in inches). Top Chord
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