The deck and roof structure of the hk convention and exhibition centre. In this section, the uniformly distributed loads from the roof as well as from the wind are concentrated on the truss joints for subsequent analyses. The components are introduced in the order that you install them in the roof construction sequence. 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. This is a project by abdirashid mohamed dahir who holds bsc in civil engineering. Design of industrial truss university of asia pacific. Roof live load dead load roof cover 12 plywood shuttering 1. Pdf the construction technology of roof steel structure in. In the engineering term the truss is defined as the twoforce member, where the members are so assembled that the. Double roof with hipped end there are many designs and combinations of double roofs. Design of a steel structure for a large span roof with emphasis on the. Flat roof construction types thermal design 1 manchester university warm roof in a warm roof construction the principal thermal insulation layer is located above the structural decking, resulting in the structural deck and support structure being at a temperature close to that of the interior of the building.
Design of a steel structure for a large span roof with. The adopted solution shown in figure 2 is elaborated bearing the principals that are common practice in designing roof steel structures, such as the adoption of a. It is not practical to analyse the building as a whole. The shape and pitch of the surfaces are basically the same, however the base shape changes from a simple rectangle to a t or l shape, on plan. Weight of roof structure 107 657 kg there cou ld be noted that received according to first methodology 2 steel sections are checked using appropriate structural software and 3d models. The attachment of non structural elements is the responsibility of the architect or designer, unless specifically shown otherwise. Chapter 5 design of wood framing framed home figure 5.
The plan reader should be familiar with roof styles and the rafter components of these designs to calculate roof framing materials and framing labor. Roof design roof design is a major feature of a houses architectural style. Ever since wooden roofs were often constructed by forming an overall triangular shape. Top 3 types of roof structures sater design collection. Design of a steel structure for a large span roof with emphasis on the verification of bolted connections david alexandre ferreira ivo thesis submitted in partial fulfilment of the requirements for the degree of master of science in civil engineering supervisor. The design of the roof will depend upon the size and shape of the ground. Hip and valley roofing property and building inspections.
Chapter 4 buildings, structures, and nonstructural. Manual for the design of reinforced concrete building. The basic objective in structural analysis and design is to produce a structure capable of resisting all applied loads. In preparing the draft, we discussed many ways of incorporating relevant information. Poorly constructed roofs endanger the people living in a building, so you need to make the roof compatible to the rest of the building in a wellengineered style. Roof framing in this chapter, we will introduce you to the fundamentals of roof design and construction. The truss structure consists of memberselements that takes only tension or compression and no bending moment in what so ever form. Structural steel the structural elements that make up the frame that are essential to supporting the design loads, e.
All of the structural members were designed in accordance with aci. A roof is an integral part of a building, and people try to personalise the roof designs to achieve optimum architectural splendour. Types of design of timber roof trusses pdf and styles. In this section, the uniformly distributed loads from the roof as well as from the wind are. Commercial building structural design and analysis major. Depending on the different type of structural syst f tem, roof structure can include the following. Ceiling joist ceiling joists are the horizontal beams that run parallel from one wall to the opposite wall of the structure. Column base usually a thick plate at the bottom of a column through which anchor bolts mechanically connect the column and transfer forces to the. Structural design of the roof structure for the swisstech convention center in lausanne conference paper pdf available may 2015 with 1,265 reads how we measure reads. An advantage of the truss design for roofs is that ducts and pipes that are. 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. Chavan, determined optimum span length for economy. Pdf stability analysis of a steel roof truss researchgate. Pyramid hip roof steel roof truss design example pdf.
Design considerations in cablestayedroof structures. Calculation of point dead load, wind load and truss analysis. The main design feature that we identified was the hip roof design which, unlike a gable roof, has all sides slope downwards to the wall at a fairly gentle slope. Close couple roof this roof incorporates a main tie which is secured to the. Generally, a building can be defined as an enclosed structure intended for human occupancy. Commercial building structural design and analysis major qualifying project april 24, 2012.
Most of the time these roof layouts are not sufficient to pass local regulations. Structural analysis methodology design roof loads are determined using the structural cover sheet of the slcc construction documents and table c31 from asce 705. The roof structure consisting of the roof framing, roof deckingsheathing, and any internal bracing also functions as a horizontal diaphragm and transfers the horizontal loads. Roof framing consists of preengineered wood trusses at 16 inches o. Structural design of insulating concrete form walls in residential construction was developed as a guideline for the design of single and multiunit residential structures using insulating concrete form icf wall systems. Total roof load including roofing, purlins, sagrods and bracings 2. Wcd1 details for conventional wood frame construction. Writing of the manual began in april, 1984, under the auspices of the committee. The corrected snow load for the roof level is derived from the contract documents. In modern double roof construction, the whole of the roof is constructed of lightweight roof trusses called trussed rafters see module 4. Column a structural element that usually carries its primary loads in compression or tension parallel its axis.
Pdf structural design of the roof structure for the. The roof structure consists of a panelized hybrid roof system, which is very common. Suneetha completed a numerical study and concluded that weight of single truss utilizing angle and pipe both is less compared to peb yet because of weight of channel purlin, weight of steel truss building is on higher side. When making a structure, it could typically be considered approved that the roof is a one shapefitsall event, yet this is most definitely not the situation. Pdf the roof steel structure in the terminal 2 building of yancheng nanyang. Wall framing 31 requirements 31 platform construction 31 balloon construction 33 window and door framing 34 endwall framing 36 interior walls 38 lath nailers 39 chapter 7. The design documents also should provide parameters for the erection sequence. Her desire is to raise the structure one full story 8 feet and use the lower level for parking and. Structural clt floor and roof construction presenter. The colour and material of the roof complement the structural integrity of a building. A hip roof performs better than any other roof structure when faced with enduring high winds. The abovegrade structure also helps resist lateral soil loads on.
Most wood used in lightframe residential construction takes the form of dimension lumber. Structural analysis and design of a warehouse building. A gable roof has a ridge at the center and slopes in two directions. The committee commissioned the examination of this draft by organizing a working groupwhich.
So most designers, sater design collection included will include a roof layout in their set of plans. However, a building includes the structure itself and nonstructural components e. It is simple in design, economical to construct, and can be used on any type of structure. The ceiling joists are attached to the top plate and tie. Structural analysis and design of a warehouse building 2 the structure to be analysed is a warehouse building used to store farming equipment and products. Building framing systems and best practices building. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2. Would the framing labor and material for a steep pitch victorian roof be the similar to a colonial. For the longitudinal stability of the structure, a transverse roof wind girder, together.
Basis of structural design for buildings and public works. For the purpose of analysis, the structure is modelled with the software sap2000 as a series of 2d structures, effectively simulating the path of forces in the. Roof sheathing is the first structural component in the load path between the roof system and the foundation. The symbols used in this chapter are from chapter 11 of the standard, the above referenced documents, or are as defined in the text.
The owner of a singlestory crawlspace home intends to elevate the structure to eliminate a repetitive flooding hazard. A pyramid hip roof corresponds an easy hip roof, however the wall surfaces are square as opposed to rectangleshaped, making the form of the structure is roof incline involved a factor in a pyramid form on top. Roof pitch frame structure angle ease of access to the roof for installation ease of access to the frame system for maintenance and repair after installation existing roof hazards such as cables and other obstacles for most applications, the preferred roof design for solar is a ballast mount. The additional extensive green roof dead load is given by dc greenworks. The objective of this design guide is to employ the technology efficiently. Technical manual for the design and construction of roofs. The first approach to achieving a strong, durable struc. It is the strongest type of roof because it is braced by four hip rafters. Structural shapes standard steel configurations produced by steel mills such as wide flanges, channels, angles, pipe, tubes, etc. While it is the erection engineers responsibility to establish the erection sequence, the design engineer is most familiar with the final structure, and can provide valuable information regarding issues of load flow and structural stability. Compact structure for flat roofs structure is made of roll formed gi profiles c channels and angles, 120gsm standard, 550gsm on request between 5070kg per kw, based on latitude stainless steel fasteners, ss stud bolts for foundations no welding required. This design also gives a greater ceiling height if required.