Wood Framing F 09


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house framing, building framing

Wood Framing F 09

  1. 1. Light Wood Frame Construction Framing Methods Floor Systems Wall Systems Roof Systems Wood Terms IBC - Type 5 Construction Professor Richard Luxenburg, AIA Anne Arundel Community College Department of Architecture and Interior Design Fall 2009
  2. 2. <ul><ul><li>L arger (5”x5” min) and fewer members (spaced further apart 2’,4’,6’, 8’o.c) </li></ul></ul><ul><ul><li>IBC - Type 4 Construction (different code requirements) </li></ul></ul><ul><ul><li>D iagonal bracing or rigid connections required for lateral stability </li></ul></ul><ul><ul><li>Exposed construction (no cavities) </li></ul></ul><ul><ul><li>T ends to be Very Expensive – guess why? </li></ul></ul>LWF (light wood framing) is Not Heavy Timber Heavy Timber is:
  3. 3. Light Wood Frame Construction………………………….(like a light balloon!) http:// www.canforcentre.com/system.html
  4. 4. Light Wood Frame Floor Systems <ul><li>Wood Joist System </li></ul><ul><ul><li>Relatively small joist members (2 x10 etc.) </li></ul></ul><ul><ul><li>closely spread </li></ul></ul><ul><ul><li>(12”, 16”, 24” o.c) </li></ul></ul><ul><ul><li>Short spans for subflooring, underlayment and gypbd. clg. </li></ul></ul><ul><ul><li>Joists supported by </li></ul></ul><ul><ul><li>beams or walls </li></ul></ul><ul><ul><li>Flexible in form & shape </li></ul></ul><ul><ul><li>(unlike grid of post & beam) </li></ul></ul>
  5. 5. Heavy Timber section of a light wood framed (LWF) house.
  6. 6. House-wrap (Dupont Tyvek) over panelled sheating. Explain why! Moisture/air infiltration. http://www.tyvek.com/whatistyvek.htm http://www2.dupont.com/Tyvek_Construction/en_US/products/residential/products/thermawrap.html
  7. 7. Project No. 1 Here’s a project you’re going to have to do this semester! So pay attention! That’s a student’s bass wood ( not balsa wood) model!
  8. 9. Wall Systems <ul><li>Wood Stud Walls </li></ul><ul><ul><li>2 x 4’s or 2 x 6’s </li></ul></ul><ul><ul><li>16” or 24” o.c. </li></ul></ul><ul><ul><li>Insulation </li></ul></ul><ul><ul><li>vapor barriers </li></ul></ul><ul><ul><li>Interior finish (gypsum) </li></ul></ul>
  9. 10. Framing Methods <ul><li>Studs sit on a platform of plywood </li></ul><ul><li>(decking/sheathing) between floors </li></ul>Studs continue from foundation to roof Platform Balloon Framing
  10. 11. Framing Methods - Balloon Frame
  11. 12. Framing Method - Platform Framing
  12. 13. Wood Terms <ul><li>Joist : horizontal or sloped framing member </li></ul>Rafter: sloping framing member for the roof Stud: vertical framing member <ul><li>Beams </li></ul><ul><li>Columns </li></ul>“ Stick built ”– not using pre-fab trusses (like the next slide) but instead using individual 2x rafters ceiling joist floor joist stud rafter
  13. 15. re - Engineered lumber Glulam (Glued Laminated Timber) I-joist LVL (Laminated Veneer Lumber) OSB (Oriented Strand Board) Plywood Rim Board Siding Specialty Wood Products               
  14. 16. <ul><li>Glulam (Glued Laminated Timber) </li></ul><ul><li>I-joist </li></ul><ul><li>LVL (Laminated Veneer Lumber) </li></ul><ul><li>OSB (Oriented Strand Board) </li></ul><ul><li>Plywood </li></ul><ul><li>Rim Board </li></ul><ul><li>Siding </li></ul><ul><li>Specialty Wood Products </li></ul><ul><li>               </li></ul>Engineered Wood & Lumber – not found nature
  15. 19. <ul><li>Header </li></ul><ul><li>Sill </li></ul><ul><li>Cripple/Jacks </li></ul>sill header cripple/jacks sill cripple/jacks stud jack stud bottom plate top plate
  16. 20. <ul><li>Plates - Horizontal members at top & bottom of studs </li></ul><ul><ul><ul><li>@ Sill </li></ul></ul></ul><ul><ul><ul><li>@ Wall </li></ul></ul></ul><ul><ul><ul><li>@ Foundation </li></ul></ul></ul>stud bottom plate top plate
  17. 21. Wood Terms <ul><li>Blocking </li></ul><ul><ul><li>Solid piece of isolated wood (stud) placed between framing members (walls, floors, roofs). </li></ul></ul><ul><ul><li>Usually for support or attachment of something else. </li></ul></ul>blocking
  18. 22. <ul><li>Bridging </li></ul><ul><ul><li>Material between framing members (continuous) to evenly distribute loads </li></ul></ul><ul><ul><li>Keeps framing members from twisting </li></ul></ul><ul><ul><ul><li>Solid blocking </li></ul></ul></ul><ul><ul><ul><li>Diagonal bridging </li></ul></ul></ul><ul><ul><ul><ul><li>Wood </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Metal </li></ul></ul></ul></ul>blocking bridging
  19. 23. <ul><li>Sheathing - material covering the framing members (roof, floor & walls) </li></ul><ul><ul><ul><li>Plywood (typically 4’ x 8’ modular sheets) roll sliced lumber </li></ul></ul></ul><ul><ul><ul><li>OSB (oriented strand board) reconstituted (recycled) wood </li></ul></ul></ul><ul><ul><ul><li>Boards (cut lumber) </li></ul></ul></ul>http://www.rd.com/content/openContent.do?contentId=17535&pageIndex=1 http://www.canply.org/english/products/manufacturing/manufacture.htm http://www.afrc.uamont.edu/pattersond/Coursework/Undergrad/plywood.htm http://www.apawood.org/level_b.cfm?content=prd_main
  20. 24. http://www.apawood.org
  21. 25. http://www.ainsworth.ca/pdf/products/ans_osb06.05.pdf
  22. 26. The true measurement of a 2x4 is actually about 1.5x3.5. When the board is first rough sawn from the log, it is a true 2x4, but the drying process and planing of the board reduce it to the finished 1.5x3.5 size. The lumber is then sold as a &quot;2x4&quot; because the cost of the drying and machining are figured in ... it is also much easier to refer to a board as a &quot;2x4&quot;, rather than a &quot;1.5x3.5&quot;.
  23. 28. <ul><li>Soundproofing Products </li></ul><ul><li>Acoustiblok ® is a unique 1.1 lb. psf U.L. Classified, high S.T.C. reinforced dense noise isolating material for reducing sound transmission. is approved by U.L. for walls, ceilings and floors (see U.L. classification. It is usually stapled to wood studs </li></ul><ul><li>Each layer of 16 oz Acoustiblok ® reduces sound transmission by as much as 30 db depending on the frequencies.   </li></ul><ul><li>A typical 2 x 4 gypsumboard stud wall is usually 33 to 35 STC. Acoustiblok® installed in the 2 x 4 wall is lab certified at an amazing &quot;STC of 52&quot;, better than 12&quot; of poured concrete (STC 51). </li></ul>
  24. 29. http://www.ainsworth.ca/pdf/products/ans_osb06.05.pdf
  25. 30. Floor Systems
  26. 31. Floor Systems
  27. 32. Floor Systems Sheathing
  28. 33. Floor Systems - Floor Projections
  29. 34. Floor Systems - Floor Openings
  30. 35. Floor Systems - Partition Connections Partition parallel to joists Partition perpendicular to joists
  31. 36. Floor Systems - Partition Connections Partition perpendicular to joists Partition parallel to joists
  32. 37. Floor Systems - Partition Connections Partition perpendicular to joists Partition parallel to joists
  33. 38. Wall Systems Corners & Partition Intersections
  34. 40. Wall Systems Door & Window Openings
  35. 41. Wall Systems - Wo od Stud Sheathing Studs @ 12” , 16” or 24” o.c.- Leaves Void spaces for insulation and space to run electrical and mechanical lines
  36. 42. end