. Roofs 8 12 Walls Exterior Walls in Elevation: see Materials & Bldg. shape Roof is 8:12 Pitch /or slope Cladding is drawn as Brick & Stucco siding Rafters Roof slope Roof Bear framing supports - give roof profile/shape Pitch/slope ratio every 12” out raise the rafter 5”or 5:12 A Rafter & ceiling joist system maybe substituted for ...A System of … Roof Trusses. Wall & Roof Framing Rarely seen drawn out completely in a working drawing set! Walls need to clarify a construction condition...Use a DETAIL Like at the Eave Rake or Ridge of Roof Details focus in from general to the specific condition * •drawn in orthographic (2-D) Bldg. Section . Details: Roof detail of eave Roof detail would be at ridge Rake wall. Joists or trusses in a Dwg Set. : 1st floor joists found on foundation plan or separate 1st fl. Framing plan 2nd floor maybe on first floor plan Roof trusses or ceiling joist maybe on 2nd floor plan. . ....Here are Headers(HDR) on a Roof Framing plan even though they are part of the Wall Framing Walls Plan shows the Roof truss layout Wall Framing Walls Sheathing Tilting up the wall from the platform framing ....(here a Roof’s Rake Wall goes up.) Structural info need to know for Roof and wall framing *headers *brace panels *bearing walls *spacing/size/span of roof truss or rafters ceiling joist * Roof framing *headers *spacing/size/span of roof truss or rafters ceiling joist * Ridge beam Eaves Hips collar-ties & ceiling joists overhangs & Rake wall valleys … p.129 Roof Framing – Basic components Walls Roof Framing Framing Contractor familiar with Common Shapes for roofs Walls Roof Framing sometimes drawn to show a complex roof System …most of the time ceiling joist laid over 2nd floor plan Walls Roof Plan is different than Roof Framing Plan - Roof slope Bear pic of platform & balloon Walls p.186 print reading for construction Roof Framing Terms Pitch to describe Slope or incline of roof Ratio b/w Horizontal run & Vertical rise …a 6:12 roof (…means for every 12” rafter rises 6”) Symbol is a“sideways” L with ratio (found on the bldg. section dwg.) Roof Truss Shape of roof pitch W Truss – most common / engineered Spans longer distances Walls W TRUSS Roof Framing Common Shapes of Roof Trusses & Framing Flat roofing system A Detail at bldg. edge “the curb” ....insulation is rigid (not batt) * Section The profile (or slope) of typical roof constructions * Insulation & ventilation key parts of enclosure system. * isometric view of eave venting Cross Ventilation at roof prevents moisture build up ...want similar amount of air in as out (sim. temp.) air flowing across roof rafter. Walls Roof Framing -Eave Detail shows how roof and wall meet ... venting & soffit Pictorial view Isometric of Roof Lookout