Flat Roof Post And Beam Construction

The figures are based on quality materials.

Flat roof post and beam construction. The tables below give maximum spans for rafters and beams. Exposed ridge beam collar ties or purlins for cathedral areas as required and 6x8 douglas fir plate beams typically 2x12 spruce rafters 2 o c. Ensure the lower sides are against the post and the opening between the upper sides faces the direction the beams will be installed. They may be constructed out of posts and beams or out of closely spaced joists.

Stress skin panels are used to carry loads and also insulate roofs. Remove the roofing materials and install 4 8 inches of rigid foam insulation board above the roof decking then new roof sheathing over that then new roofing materials. See more ideas about flat roof steel structure steel house. For areas with attic space above flat ceiling ceiling joists are included but the remainder of the ceiling system above is by owner contractor.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. There is a good deal of variety in the design of flat roofs. The various framing patterns are shown in figures 18.

Chapter 7 ceiling and roof framing 40 ceiling joists 40 flush ceiling framing 42 post and beam framing 42 roof slopes 44 flat roofs 45 pitched roofs 45 valleys 48 dormers 48 overhangs 48 ridge beam roof details 49 lightweight wood roof trusses 49 chapter 8 wall sheathing 53 types of sheathing 53 corner bracing 54. Fit a metal post cap beam connector on the top of the post. The panels are called sip s structural insulated panels. And cdx fir plywood.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Post and beam home design. They may or may not have an overhang. First roof area assembly the first roof area is constructed with heavy timbered components that are secured to the ridge beam and second floor beams.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. These timbers are then tied together with collar ties the horizontal members and gusset plates the metal fasteners as you can see in the photo below right. To the right is a picture of a typical wall roof system. Jun 3 2017 explore anthony valentine s board flat roof on pinterest.