First, the tributary roof load flowing to the end of the ridge beam is calculated, then this point load, p, is. Construction details are provided for the following spf roof system types. Rules for framing hauling lumber from place to place is timeconsuming and hard on your body. This construction details booklet contains typical details of framing members, sheeting, trim, and accessories common to most dean buildings.
Mansard roofs are, for the most part, based on standing seam or batten seam construction. The framing of a basic gable roof is based on a rightangle triangle, and the various roof framing components fit the triangle. Chapter 8 construction details provides technical information concerning the design and installation of construction details for quality spf roof systems. In addition to floor and roof framing details, this guide includes recommendations for cantilevers and placement of web holes. In addition to being used in residential construction, the flat roof is typically used on commercial structures to provide a platform for heating and other mechanical equipment. Do not stack building materials on unsheathed joists. Good installation begins with specification of the correct joist for the application. Chapter 1 for more detailed references to house framing and related construction details. Roof framing guidelines calculating load on a king truss to design a rafterjoist king truss to support the end of a structural ridge, the engineer must calculate the tension force, t, that will be induced in the joist. Download the family of cemco fas track and dda typical details here. Roof hugger sub framing details are never intended to replace details recommended by the metal roof manufacturer or designer of record. Floor framing on top wall framing in middle roof framing on bottom t was a coincidence that another contractor and i began framing houses next door to one another on the same day. We will be updating the current 2d details with 3d details soon.
Most wood used in light frame residential construction takes the form of dimension lumber. Framing details for plumbing, heating, and other utilities 49. 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. The horizontal line formed by the joining of the top edges of two sloping roof surfaces. A roof plan shows the shape of the roof, as well as roofing materials, underlayment and location of vents. As well as the small selection of roof detail drawings shown here, many of the building notes have a related construction detail drawing, with specific dimensions eg rafter sizes, spans, insulations types, for purchase with the building specifications. Framing a roof berlinboylston regional school district. The plan reader should be familiar with roof styles and the rafter components of these designs to calculate roof framing materials and framing labor. But by the time his house was framed, mine was shingled, wired, and plumbed. Roof framing in this chapter, we will introduce you to the fundamentals of roof design and construction. Record and photograph the type of secondary spanning members bar joist, wood. This introduction is intended to supplement the special notes on the individual construction details. 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. Roof plan a roof framing plan shows size and direction of the construction members that are required to.
The uplift load minus sixty percent of the roof andor ceiling dead load is applied at the top of the uppermost wall. Ijoists requires the same basic understanding of rafter layout and roof design. Balloon construction 33 window and door framing 34 endwall framing 36 interior walls 38 lath nailers 39 chapter 7. Construction details are provided for the following spf roof. For more photos and information on framing and detailing a gambrel roof, click the view pdf button below. Canadian woodframe house construction cmhc offers a range of housingrelated information. The construction of the verge of a gable roof is shown below. Curators distinguished teaching professor emeritus director, weiwen yu center for coldformed steel structures.
What factors influence the best roof pitch for a building. This frame consists of the last two rafters joined together by. Framing a roof is the last step in framing new construction. For details, call 18006682642 or visit our website at. The lower ends of the pans are typically hooked over an edge strip to form a drip. Cette publication est aussi disponible en francais sous le titre. To view a cad detail, you will need a cad design program or a cad viewer program. The plan reader should be familiar with roof styles and. The dead load from floors framing into walls is not included, in order to eliminate the need for special framing details. The framing details required in section r802 apply to roofs having a minimum slope of three units vertical in 12 units horizontal 25percent slope or greater. Steel framing guide 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 introduction steel framing is a practical, code approved solution to many of the limitations that builders face today when using. For specific metal roof flashing, trim and fastening requirements, refer to your metal roof manufacturer or project designer of record for their specific project details, specifications and practices. The designers guidethe designers guide toto tremco slope.
Construction system, for definitive reasons, is the manner of constructing the whole or dominant part of the house 1. 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. With inline framing, double top plates can be eliminated because the load is distributed evenly through the top plate. The roof extends over the gable wall to give a suitable overhang. Lsf products are cold formed structural members used as studs, joists, rafters, purlins and girts and in assemblies such as steel roof trusses and panelized walls. 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. Align floor, wall, and roof framing members directly above or below one another so that loads are transferred directly downward. For technical classification purposes the determining factor has been first, the type of external wall construction and second, the roof and floor construction. Mar 27, 2008 the framing of a basic gable roof is based on a rightangle triangle, and the various roof framing components fit the triangle. Roof design roof design is a major feature of a houses architectural style. To achieve this is a simple frame called a ladder frame is constructed. Chapter 8 construction details progressive materials.
The focus of this project was on connections used with conventional light frame wood roof construction. Flat roof 4 tables a notes frame v details section 01. Wcd1 details for conventional wood frame construction. Many elements of a home work together as a system to resist lateral and.
As this load is carried down the wall, the wall dead load is included in the analysis. The flat roof is a very common style in areas with little rain or snow. Porch construction drawings may be used in conjunction with site plan for permit submittal. Endwall framing 36 interior walls 38 lath nailers 39 chapter 7. Identify the existing structural roof framing from beneath the roof. When used, it must be shown on the roof plan flat roof. Tuomi on this system and it is available to anyone who wishes to make use of it. It is for that reason that the flat roof construction manual focuses on the subject of designing energysaving flat roofs free from damage. 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. North american standards for coldformed steel framing 11 roger laboube, ph. Stack framing details use of scrap foam sheathing and reduce waste. Tion flat roof 4 fe ii basement solid nasonr details ii.
While most home builders will outsource the construction of roofing trussesthe rafter supports of the roof itselflearning to frame a roof yourself is one of. 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. Porch roof attachment to top of existing wall not to scale. When a slope triangle is used, it is rise over run. Previous versions of this document have followed the. Tiedown fixings tiedown fixings are used to resist uplift and shear forces lateral loads in floor framing, wall framing and roof framing. Roof plan a roof plan is commonly drawn to a scale of 18 inch per foot or 116 inch per foot. As you will see in chapters 4 and 5, these elements control virtually everything in the design of the new retrofit framing system. The ends may alternately attach to the base flashing where a change in roof slope occurs. This standard details manual, aka the blue book, is the right tool to have at your fingertips. Parts of a roof a ridge board is a horizontal member of the roof frame. It was no coincidence that the other contractor ran out of money and had to.
A vertical wall assembly capable of resisting lateral. 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 shortterm load snow loads 712 cs 0. Lightweight steel framing architectural design guide preface this publication is intended as a guide for designers, speci. This guide uses nominal member size, but it is important to note that the designer must apply the. Using this booklet in conjunction with the blueprints and shipping list prepared for a specific building will permit an. Canadian wood frame house construction cmhc offers a range of housingrelated information. Detail plates for studs, doors, windows, and intersecting walls. Framing and closing in the sections contained in this chapter address the tasks related to erecting the structural framing for the house. Roof structures roofs 12section module 3 sheet 10 verge details and ladder frame the construction of the verge of a gable roof is shown below. The focus of this project was on connections used with conventional lightframe wood roof construction. By knowing you have access to all of the right information from proper storage and installation instructions to trim and flashing details, you can be confident installing your fabral materials. When you locate the detail you want, just click one of the four file format buttons to download it to your computer. Cad details document name pdf dwg download all cad construction details 37. Chapter 8construction details provides technical information concerning the design and installation of construction details for quality spf roof systems.
Roof framing connections in conventional residential. Framing is the process of connecting building materials together to create a structure. Studs, plates, headers, rafters, girders, flooring and joists are all terms used to identify different components in framing. A truss frame consists of a roof truss and a floor truss joined by exterior wall studs. Building framing systems and best practices building framing. In the plank and beam framing method, beams of ad equate size to support floor and roof loads are spaced up to eight feet apart. Bct 122 roof framing 1 roof framing plans architectural roof style identification roof framing material calculations from plans. Cad details are available in dwg, dwf, dxf and pdf format. Would the framing labor and material for a steep pitch victorian roof be the similar to a colonial. 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. When practical, details that minimize the amount of wood transferring loads. Tfs evolved from field observations that framing failures commonly occurred at connections between floor, walls, and roof.