Flat Roof Post And Beam Construction

Here we have a wood framed gable roof.

Flat roof post and beam construction.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. A system of horizontal beams that transfer structural loads to a system of vertical posts. The tables below give maximum spans for rafters and beams. The figures are based on quality materials.

For additional stability you can also use steel joists that are built into one or both of the walls. So any timber joists that are used need to be strong enough to support this weight. Post and beam is visually quite distinct. 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.

Post and beam home design. How to frame a flat roof on posts. Post and beam construction is just that. Continuing on from part 3.

More traditional post and beam construction also employs a series of diagonal braces that reinforce the beams and help to make the structure rigid. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. As you may imagine there is a fair amount of weight involved here in terms of boards felt etc.

For areas with attic space above flat ceiling ceiling joists are included but the remainder of the ceiling system above is by owner contractor. Framing a flat roof for a carport or other type of freestanding structure is an opportunity for a do it yourself homeowner to apply basic carpentry skills. 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. And cdx fir plywood.

Let s consider a basic gable wood roof framing design. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. 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. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Jun 3 2017 explore anthony valentine s board flat roof on pinterest. Sizes of joists needed for flat roof construction.