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. Prescriptive solutions for the connection of the roof framing to the wall top plates are available in building codes and wind design standards. Parts of a roof a ridge board is a horizontal member of the roof frame. Everything was going great until i started trying to. Window and door framing 34 endwall framing 36 interior walls 38 lath nailers 39 chapter 7. As you will see in chapters 4 and 5, these elements control virtually everything in the design of the new retrofit framing system.
These are so noted in this design guide for understanding what tremco roofing and building maintenance is not responsible for on a retrofit and metal roof system order. Identify the existing structural roof framing from beneath the roof. You can do this with a foam layer that exactly fits your roof. This will help you create a flat roof framing plan. Flat roofs are always built at a slight incline, at least 18 inch per foot. Roof plans a roof plan is used to show the shape of the roof. Whenever possible, begin trim installation at the downwind end of the roof, farthest away from the source of prevailing winds, to allow flashing laps to face away from winddriven rain. Bct 122 roof framing 1 roof framing plans architectural roof style identification roof framing material calculations from plans. Inline framing align floor, wall, and roof framing members directly above or below one another so that loads are transferred directly downward. When roofs collide 2 will beemer historic american roof trusses 12 ii. Mitek trusses provide more design flexibility, inside and out, than conventional framing.
Factory built better quality control reduced construction cost hauled to site and lifted into place. Roof plan a roof plan is commonly drawn to a scale of 18 inch per foot or 116 inch per foot. Framing a roof berlinboylston regional school district. Roof framing and drainage plans will be discussed in chapter 30. Record and photograph the type of secondary spanning members bar joist, wood. The first approach to achieving a strong, durable struc. Ceiling and roof framing 12 roof designs 72 manufactured wood roof trusses. Please use your judgment and common sense and go over the list to make sure everything looks good. If you know the slope x in 12 you want to use for your roof framing design, you can use it, along with the run r, to determine the height of the ridge beam. Another thing that you need to consider framing a porch roof is the style or design. Even though the real and main purpose of having a veranda is to serve as protection of your house from any kind of weather. Bracing design for high end of hipvalley rafters bracing design for rafter purlins nonsymmetrical hip roofs roof diaphragms with plate. Roof span this is the distance across the roof and measured to the outer edges of the wall plates.
The framing style of the roof refers to the actual components of each roofing truss and the design of the structural foundation of that roof. 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. Roof framing connections in conventional residential. Part of thebioresource and agricultural engineering commons, and theconstruction engineering commons. Factory built better quality control reduced construction cost hauled to site and lifted into place computers allow complex. Roof design roof design is a major feature of a houses architectural style. For some types of roofs a roof drainage plan may also be drawn.
Queenpost trusses jan lewandoski historic queenpost truss analysis 21 ed levin framing the montebello pavilion 23 oliver amandi, markus brunn timber framing, journal of the timber framers guild, reports on the work of the guild and its. A gable roof has a ridge at the center and slopes in two directions. Valley roof a valley is a roof design that creates a v. Roof framing is one of the most challenging tasks of framing. Inline framingalign floor, wall, and roof framing members directly above or below one another so that loads are transferred directly downward. The roof and mezzanine framing plans are shown in figure 6. This guide uses nominal member size, but it is important to note that the designer must apply the. Valley roof a valley is a roof design that creates a v shape. Along the way, learn the many different styles and techniques that can be used in roof framing. Analysis and design of a rigid frame gambrel barn roof charles erskine rice iowa state college follow this and additional works at. Roof plan a roof framing plan shows size and direction of the construction members that are required to. Building framing systems and best practices building.
Dealing with two roof pitches instead of one seems to complicate matters disproportionately. Endwall framing 36 interior walls 38 lath nailers 39 chapter 7. Porch roof design roof truss design garage design framing construction roof trusses roof joist roofing felt palette gable roof how to cut roof rafters. Tiedown fixings tiedown fixings are used to resist uplift and shear forces lateral loads in floor framing, wall framing and roof framing. Building framing systems and best practices building framing. Also, most gambrel roofs require a kneewall to support the knuckle, or the joint between the upper and lower roof slopes. Most plans include list of materials needed to build a leanto addition. Many people have a problem calculating a simple roof rafter let alone full hip roofs by simply knowing what the pitch of roof is. Code compliant construction structural building components. Framing and closing in the sections contained in this chapter address the tasks related to erecting the structural framing for the house and creating an enclosure. The project architect briefly discusses the basics of gambrel roof design. Less labor to install trusses than to stick build roof. Wcd1 details for conventional wood frame construction.
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 loadbearing wall systems in most residential and light commercial construction. The designers guidethe designers guide toto tremco slope. Another common design in the northeast is the saltbox, which is a gable roof with one longer side. Roof frame plan details the rafters and the spacing of the roof. Parts of a roof the main structural parts of a roof are ceiling joists, ridge board, jack rafter, hip rafter, common rafters, creeper rafters, raking plates, out riggers and noggings or last rafter overhang. One method of sizing the connection between the roof framing and the exterior wall is provided in example 9. Framing and closing in the sections contained in this chapter address the tasks related to erecting the structural framing for the house. For example, if the slope is 4 in 12, and the run is 12 feet, the ridge beam height m will be 4 feet. Roof framing after the roof design is selected, the next decision is the type of roof construction trusses or stick built.
With inline framing, double top plates can be eliminated because the load is distributed evenly through the top plate. Tables w1 and w2 of design values for joists and rafters, a supplement to these span tables, provide such values for them ostc ommonly used framing sizes. Metal connectors are typically used where uplift forces are large. When framing a flat roof, you will need to create a slight incline. How to build leanto addition free pdf leanto roof plans. Wind loads above, figure 1609, basic wind speed 3second gust, 33 feet above ground, exposure c ibc 2003 zone v 30 mph 1 2 3 70 80 90 western mass. 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. The plan that is drawn of the roof area may be either a roof plan or a roof framing plan. Framing any roof but particularly a gable roof, low slope roof, and cathedral ceilign roofs requires collar ties, rafter ties, and possibly a structural ridge beam to support the roof and to.
After the roof design is selected, the next decision is the type of roof construction trusses or stick built. When roof framing it all begins with the framing square and the layout of the common rafter. Roof pitch the roof pitch is the numerical measure of how steep or shallow a roof is. Parapet wall design brief history biblical times deuteronomy 22. Roof framing learn how to frame a roof and calculate. Mar 27, 2008 roof framing is one of those carpenter skills that appears quite complicated, and indeed, some roof designs are difficult. Roof framing is one of those carpenter skills that appears quite complicated, and indeed, some roof designs are difficult. The plan reader should be familiar with roof styles and the rafter components of these designs to calculate roof framing materials and framing labor.
London building act of 1707 banned projected eaves. Porch construction drawings may be used in conjunction with site plan for permit submittal rafter size and spacing. Tremco roofing and building maintenance shall design the framing and cladding systems. As discussed in chapter 1, the residential construction. Modulus of elasticity e, bending design values f b, and compression design values perpendicular to grain f c. House framing or rough carpentry wood roof structure. Conventional framing requirements however, the irc gives no guidance on other aspects of the roof framing, such as. Offering numerous custom design options, our trusses present an economical and structurally superior method for rapid erection. Lay out a common rafter, using at least one of the four basic methods. Mar 10, 2019 also known as the french roof, the mansard is characteristic of french building architecture, though many homes take advantage of its framing design. Methods of reducing building costs 201 design 201 choice of materials 202 construction 203 chapter 32. The engineering knowledge needed to costeffectively design homes or evaluate residential construction guidelines are lacking in this area. L00110, design of diagonal strap bracing lateral force resisting systems for the 2006 ibc l20009, roof framing anchorage forces.
Some roofs actually slope in several directions, ensuring optimal water runoff. The size of the ridge board and hip and valley rafters. Expected snow load syazli 2005 2 the basic design principle in the pitched roof is that by overlapping materials in the. Would the framing labor and material for a steep pitch victorian roof be the similar to a colonial. Lp solidstart woode design software is a convenient structural design program that lets you create accurate and efficient wall, floor, and roof framing designs using lp solidstart ijoists, lvl, and lsl products. It is also a good idea that the roof of your porch is attractive so that it can make your house more beautiful.
It may consist of a flat roof on top, but the main design element is the multipitch sloped in what is essentially a hip roof on top of another hip frame. Acknowledgements issued also in french under title. I admit, the roof framing on the fhb house is more complicated than it had to be. Steel framing guide a n e a s y t o u s e g u i d e f o r s t e e l f r a m e c o n s t r u c t i o n 5 prefabricated systems walls, floor panels and roof trusses of cfs that are built in a factory will require engineered drawings and layouts for building code approval, just like any other premanufactured. Structural design for residential construction presentation 4.
A roof plan shows the shape of the roof, as well as roofing materials, underlayment and location of vents. If youre framing a gable roof on a new house, or building a shed or even a doghouse with a gable roof, youll need to cut a number of roof rafters. Roof framing connections in conventional residential construction. Chapter 5 design of wood framing the principal method of design for woodframed construction has historically been allowable stress design asd. Such framing is designed ac cording to accepted engineering practice. The finished ridge beam height z above the top of the wall will be m plus the y height. This frame consists of the last two rafters joined together by means of noggings.
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 lightframe wood structures may be built without the need for engineering analysis of each component. Roof framing in this chapter, we will introduce you to the fundamentals of roof design and construction. Canadaian roof structure framing suggestions, codes, guides for gable roofs, low slope roofs, cathedral ceilings. Most wood used in light frame residential construction takes the form of dimension lumber. Previous versions of this document have followed the. Develop framing plans for a gable roof, hip roof, and variations that include valleys. Bracing design for high end of hipvalley rafters bracing design for rafter purlins nonsymmetrical hip roofs roof diaphragms with plate height changes large roof openings greater than 6 wide. This design also gives a greater ceiling height if required. Follow the process taken to design an appealing roof. Analysis and design of a rigid frame gambrel barn roof. Roof structures roofs 12section module 3 sheet 8 pitches, spans and rises when setting out a roof, there are certain essential factors that must be considered. Basic roof framing instructions carpentryproframer. Partially, these will depend on the style of roof youve selected, but youll also have some wiggleroom depending on the design elements of the house.
729 1056 1337 721 330 397 1376 742 506 1228 1558 1540 1225 905 438 11 983 714 1090 1375 1344 1450 1526 314 1508 921 793 1192 472 1499 1581 893 839 500 269 157 1445 75 420