Residential Wood Frame Flat Roof Details

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.

Residential wood frame flat roof details.

Some roofs actually slope in several directions ensuring optimal water runoff. Best materials ph. Timber frame flat roof detail. 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.

From there the flat roof system you choose will determine the materials you apply. 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. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Of course you don t need to live in a modern house to deal with a flat roof.

When framing a flat roof you will need to create a slight incline. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. This will help you create a flat roof framing plan. Flat roofs are always built at a slight incline at least 1 8 inch per foot.

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. You can do this with a foam layer that exactly fits your roof. 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.

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. This is known as prescriptive. Flat roof construction for residential.