Wood Framed Residential Flat Roof Detail

Residential structural design guide 5 1.

Wood framed residential flat roof detail.

Of course you don t need to live in a modern house to deal with a flat roof. This could mean flat roofs may not raise the same red flags they used to. Block double top plate wall section. When framing a flat roof you will need to create a slight incline.

Standard details for metal roofing siding post frame and residential structures distributed by. Flat roofs are hard to replace. 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. 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.

You can do this with a foam layer that exactly fits your roof. 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. Panel w 8d 6 6 12 oc common nails 2x roof r w r 30 batt. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology.

This will help you create a flat roof framing plan. This is known as prescriptive. Flat roofs are always built at a slight incline at least 1 8 inch per foot. Design of wood framing 5 1 general.

Examples that detail the appropriate use of the equations for specific structural elements or systems in light wood framed construction. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. 2x ceiling joists 2x solid blocking w approved framing anchor ea. 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.

Best materials ph. Some roofs actually slope in several directions ensuring optimal water runoff. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.