DRAFTING ROOF

• Angle-iron


  A structural piece of rolled steel shaped to form a 90° angle
• Butterfly roof


  A roof with two sides sloping down toward the interior of the house
• Dome


  A hemispherical roof form
• Dormer


  A structure projecting from a sloping roof to accommodate a window
• Eave


  The part of a roof that projects over a wall

  
• Fascia


  A surface finish material used to cover another surface
• Flashing


  The material used for covering exposed places outside the building like firewalls
• Flat roof


  A roof with a minimum pitch for drainage
• Gable


  The triangular end of an exterior wall above the eaves
• Gable roof


  A roof that slopes from two sides only

  
• Galvanize


  A lead and zinc bath treatment to prevent rusting
• Gambrel roof


  A symmetrical roof with two different pitches or slopes on each side

  
• Hip rafter


  The diagonal rafter that extends from the plate to the ridge to form the hip
• Hip roof


  A roof with four sloping sides

  
• Mansard roof


  A roof with two slopes on each sides with the lower slope much steeper than the upper

  
• Overhang


  The horizontal distance that a roof projects beyond a wall
• Pitch


  The angle between the top plate and the ridge board. It is also referred to as the rise over the run
• Purlin


  A horizontal structure member which hold rafters together
• Rafters


  Structural members used to frame a roof

  
• Ridge


  The top edge of the roof where rafters meet
• Ridge cap


  A wood or metal cap used for roofing at the ridge

  
• Rise


  The vertical height of a roof
• Roll roofing


  A material of fiber and asphalt manufactured in rolls
• Shed roof


  A flat roof slanting in one direction

  
• Shingles


  Thin pieces of wood or other materials that overlap each other in covering a roof
• Truss


  A prefabricated triangular shaped unit used for supporting roof loads over long spans

  
• Valley


  The internal angle formed by two slopes of a roof
• Valley rafter


  The diagonal rafter forming the intersection of two sloping roofs
• The roof is the external upper covering of a house or building. It shows the size, shape and the type of materials that should be used in the roofing system.

  
• Basic types of roofs

  • Gable
  • Hip
  • Gambrel
  • Mansard
  • Shed

  
• Gable roof


  • Has a pitch on two sides but no pitch on the gable ends
  • Used extensively on Philippines "bahaykubo" and raw houses in subdivision
  • Pitch or angle varies from high pitch on chalet A-frame style buildings to low pitch on most ranch homes

  
• Hip roof


  • Used when eave-line protection is desired around the entire perimeter of the building
  • Very popular in warm climates
  • Commonly used on Regency and French Provincial homes

  
• Flat roof


  • Used to create a low silhouette on modern homes
  • Slightly heavier rafters are needed
  • Built-up asphalt construction is often used
• Shed-type roof


  • Higher at one end than the other
  • May be used effectively when two levels exist where additional light is needed

  
• Overhang


  • Roof type where the pitch is low and extends on the side of the building perpendicular to the rafters direction
  • Provides additional protection from the sun and rain
• Roof plan


  A plan showing the outline of the roof and the major object lines indicating ridges, valleys, hips and openings. It is not a framing plan, but a plan view of the roof.

  
• The roof plan indicates the roofing sheets, ridge roll, ridge cap, and eaves line or gutter line.

  
• Different types of roofing sheets

  • Corrugated G.I Sheet
  • 4-V Corrugated Sheet
  • Ardex Corrugated Sheet
  • Kanalelas Corrugated Sheet
  • Steel Bricks
  • Color bond Custom Orb

  
• Types of roof frame

  • Rafter Type
  • Truss Type

  
• Rafter type

  • Common Rafter
  • Hip Rafter
  • Valley Rafter
  • Jack Rafter
  • Hip Jack
  • Valley Jack
  • Cripple Jack
  • Octagonal Rafter