Residential Wood Frame Flat Roof Details

Timber frame flat roof detail.

Residential wood frame flat roof details.

This is known as prescriptive. 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 installation of sheathing 54 chapter 9 roof sheathing 58 lumber sheathing 58. You can do this with a foam layer that exactly fits your roof. Roof snow drift surcharge a n g l e note a 15 increase in the allowable capacity of wood for loads that include snow which is a short term load snow loads 7 12 cs 0 99 slope 8 12 0 91 9 12 0 83 10 12 0 75 11 12 0 69 12 12 0 63 note that roofs exceeding an angle of 30 degrees may reduce the ground snow load.

This will help you create a flat roof framing plan. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Flat roof construction for residential. Flat roofs are always built at a slight incline at least 1 8 inch per foot.

Standard details for metal roofing siding post frame and residential structures distributed by. From there the flat roof system you choose will determine the materials you apply. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. Introduction to prescriptive roof framing 3 prescriptive roof construction the international residential code irc and the international building code ibc set out specific guidelines within which conventional light frame wood structures may be built without the need for engineering analysis of each component.

Some roofs actually slope in several directions ensuring optimal water runoff. A literature review was conducted and supplemented with new research on the performance of conventional roof systems and components including ceiling joist to rafter connections and roof framing to wall connections. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Best materials ph.

Details for conventional wood frame construction the first approach to achieving a strong durable struc ture involving economical use of materials is to follow a. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.