Attic Structural Support

Domestic roof construction is the framing and roof covering which is found on most detached houses in cold and temperate climates.

Attic structural support.

Such roofs are built with mostly timber take a number of different shapes and are covered with a variety of materials. I called out insufficient structural support in this attic space what do you guys think. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. An attic bedroom requires both a window and a staircase to the level beneath.

If the joists are larger they might support attic flooring but the only reliable way to know for sure is to have a structural engineer take a look at your attic support system. Collar ties rafter ties tension beams structural ridge beams. Here we have a wood framed gable roof. It s 16 2x6s on 24 center with a 1x6 at the peak no collar ties no vertical support depending on the roof pitch and rafter span vertical support may not be required on all roofs but you are correct the rafters are over spanned.

Having an escape ladder in clear view is always a good idea. Let s consider a basic gable wood roof framing design. The exterior wall and the headers within will carry all loads from the mid point of the house between the. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

Some of these can support the roof and prevent ridge sagging and wall spreading. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Here each square foot of roof system delivers 50 pounds of live load and 15 pounds of dead load 65 psf total to the structural support system. Structural support is a part of a building or structure providing the necessary stiffness and strength in order to resist the internal forces vertical forces of gravity and lateral forces due to wind and earthquakes and guide them safely to the ground.

Remember these loads are distributed uniformly over the entire surface of the roof. Continuing on from part 3. External loads actions of other bodies that act on buildings cause internal forces forces and couples by the rest of the structure in.