Rafter & Roof Framing Checklist

  • Ridge board has to be at least same thickness (or greater) since the plumb cut of intersecting rafters.
  • Assess rafters set up 24″ O.C., or a program. (i.e., 12″, 16″, 19.2″, or 24″)
  • Rafters must be structurally sound, crown up, nevertheless cause no apparent hump in plane of roofing
  • Inspect all rafter cuts
  • Plumb cuts must keep fully against ridges, buttocks, and valleys. Conditions by which a rafter cut is too brief or only a small percentage bears about the structural member (heel or toe) should possess a 3′ scab secured and braced at the affected end.
  • Birdsmouths must bear snug at topplate with minimum-to-no saw overrun(s) and create a consistently straight ceilingline.
  • Rafter tail length (horizontal plane measured by the outside border of topplate) should allow eaves construction having a soffit depth of 12-24 inches, or per program (average box window overhang a minimum of 6 inches).
  • Assess collar ties on each other rafter (protected each connection using 3 claws), over 18 inches of bottom of form board. Utilize random-length 2.
  • Purlins to be same dimension timber as the rafters being encouraged
  • The location of purlins to function as a strategy and according to maximum allowable unsupported span tables in the residential code (approximately each 8′ of all rafter span).
  • Purlin brace each other rafter (protected each connecting using 3 nails). Check bearing and brace angle. As needed choice purlin bracing could be used.
  • Purlin may be invisibly into every brace, or bear on a two′ long 2×4 block — teed into the top of brace (protected with 5 claws)
  • Brace should be oriented at approximately 90 degree angle to the encouraged rafter(s)
  • Splice common & jack rafters above a purlin with 4′ of overlap between top & bottom sections. If a purlin is not handily coordinated, then add a duvet straight beneath the splice (ensure the limits defined in the most allowable unsupported length tables of the residential code are not exceeded)
  • Splices at ridges, hips and slopes shall be gusset-reinforced scissor splices. Requirements include:
    24″ scissor-splice, pinpointed top & bottom
  • Minimum 4-foot OSB/Plywood gussets (minimal thickness — 7/16″) cut to exactly the same depth as the rafter, on either side of splice
  • Braced right beneath the splice and endorsed by bearing wall or structural column
  • Ridge board to be braced at ends and where possible. Brace to be T-blocked complete length
  • Hips exceeding 14 feet in length must include a midspan brace. Any brace exceeding 6-feet in length must be the duration that is T-blocked 2/3.
  • Braces are needed under valleys anytime the penis crosses over a topplate or structural column (Any brace exceeding 6 feet in length must be T-blocked 2/3 the length). Studs and cripples under valley has been doubled.
  • Terminate ceiling joists (interfering with valley rafter setup) short of this valley. Header off to ceiling joists on either side. Utilize joist hangers and think about receding joists, if necessary
  • Rafter bracing
  • Assess no roof associates braced to ceiling joists or strongbacks over dwelling space
  • Notice: roof construction can be braced directly to garage ceiling joists only. A 2×2 or 8×10 layed level and constituting a minimal 3 joists must act as the foundation.
  • While engineered beams can be installed flush to the topplate, solid-sawn beams should be elevated (floated) a minimum 1 1/2″ over the ceiling line, whenever bracing to a wall just isn’t possible.
  • Notice: Floating beams may be set up with an orientation parallel, vertical, or on a diagonal to ceiling joists.
  • Roof loads must transfer from every beam end to structure which transfers these forces to the compression zone. After a beam is raised too high — 2×4 outriggers (diagonal braces) can be added to both sides of the beam to provide lateral stability during installation of this column
  • Note: An exception to the float beam limitation exists for beams dangled over garage places. Solid sawn beams over garages could be installed flush with an topplate to reduce the size of end cuts that were tapered at outside walls.
  • Any Limit exceeding 6 feet in length must be T-blocked 2/3 the length.
  • Palm bracing is accepted practice as long as the palm offers secure, dependable bracing to all supported members.
  • Gables
  • Furr outside 16″ O.C. or per strategy in siding regions
  • Gables more than 4′ in elevation require a stiffener or strongback in cripples, with a diagonal brace secured to a structural beam or topplate
  • Note: caked structure can be braced into garage ceiling joists just
  • Detached Garages & Covered Walks
  • Construct to the same criteria and tolerances as your home framing
  • Build fireblock involving home & detached garage. Find at garage finish or mid-span to house
  • Separation of walkway beams shouldn’t exceed together with the width of the sidewalk (usually 4-feet) involving the house and detached garage. This ensures each midspan support column will probably rest to the flatwork under to completely support, stabilize and transfer roof loads to the ground below.

 

Be sure that you get a professional to help with any repairs that are required on your rafter or roof, most construction services companies will be able to help you out with any repairs that you need.