Wrong Residential Roof Frame Construction

Building framing begins with the roof framing structure.

Wrong residential roof frame construction.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The application of conventional construction rules may be limited by building code requirements in use where the building is being constructed. While wood frame construction makes it easy for builders to construct strong durable buildings wall studs alone can t withstand high wind and seismic forces. Framing a roof is the last step in framing new construction.

And the line length measurement from the roof peak to the building wall is the hypotenuse. Time of manufacture producing mill number and the grad. Framing materials are usually wood engineered wood or structural steel the alternative to framed construction is generally called mass wall construction where horizontal layers of stacked materials such as log building masonry rammed earth adobe etc. The run or half the building span is the base of the triangle.

However before concentrating on roof framing a brief discussion of diaphragms and shear walls is presented because they are two of the key elements in the framing of load bearing wall systems in most residential and light commercial construction. Specify ventilation rates as a minimum of 1 sq ft 0 093 m 2 of opening per 150 sq ft 14 m 2 1 150 with a ratio of 1 300 in some conditions. Common types of roofs and basic framing terms. Are used without framing.

1 roof leaks and moisture with any roof no matter what type if you ve got roof leaks then you ve got a problem explains charles praeger executive director metal building manufacturers association mbma cleveland. Building codes in the u s. Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. The rise or height of the roof at its peak is the altitude of the triangle.

It is the form most commonly used by. A continuous load path safely transfers the lateral vertical and racking loads caused by severe weather and earthquakes from the roof wall and floor systems to the foundation. Leaks can occur for a number of reasons. Balloon construction 33 window and door framing 34 end wall framing 36 interior walls 38 lath nailers 39 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.

Gable a gable roof has a ridge at the center and slopes in two directions. An example of each is shown in figure 2 1. Ventilation of the roof deck speeds the evaporation of water from leakage or condensation and removes heat which helps prevent ice dams and helps asphalt shingles last longer. While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below.