ROOF
           Roof Construction
                        Roof Framing
    • After the roof design is selected, the next 
      decision is the type of roof construction-- 
      trusses or stick built.
    • Trusses.
       – Less labor to install trusses than to stick build 
        roof.
       – Factory built
          • Better quality control
          • Reduced construction cost
          • Hauled to site and lifted into place
       – Computers allow complex designs.
    • Stick built
       – Higher labor costs for complex roofs
       – More variability in quality
       – High level of skill required to produce 
        complex rafters
       – Requires more scaffolding and other 
        supports for construction
                                           Roof--Truss
      •  Different types of trusses can be used for roofs.
      •  The type used will be determined by the use of the building, size of 
         the building and/or the owners preferences.
      •  Most trusses are custom built for the building.
      •  Trusses can be wood or metal
      •  Truss nomenclature:
            Gussets                                                         Rafters
                                                 Webs
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