The Canadian Guide to Mid-Rise Wood Construction 2021
The Mid-Rise project and the ensuing publication were conceived in order to provide a guide for opportunities that have been created by Canadian Code Provisions progressing, allowing 6 storey wood buildings over at least a decade. The foundation for some of the ideas contained within, came from the Wood WORKS! program hosting regional focus groups, made up of key industry stakeholders. They were held at various locations across Canada during 2019. From the focus-group conversations and the research gathered and analyzed, it was evident that each province was at varying degrees of adoption, understanding and application for wood buildings up to 6 storeys. The opportunities that are available for wood use in mid-rise development are varied and many and it is hoped that some of the illustrations and information contained inside this guide will continue to inspire the design and construction industry. The Code Matrix captures the variations of code provisions currently in use in each of the Canadian provinces, and highlights Part 3,4 and 5 requirements for wood buildings up to 6 storeys in height. Permissible building types, heights and areas, permitted mixed major occupancies, required fire resistance ratings and sprinkler provisions are illustrated. The flow of the sections is laid out to mirror basic project planning steps that are generally undertaken by design teams. A keen understanding of what is allowed by code, creates the conversation around ideas for buildings and potential project opportunities. The location of a site, how it fits into local planning and zoning regulations, and a business case that makes it achievable, are all stages a design team navigates early with a client. Many factors drive the business case. Goals set early for greener and environmentally sustainable development, applications of sustainable materials having significantly lower embodied carbon, can be incorporated into design principles. Schedule often drives design and project efficiency, creating consideration into using prefabricated and modular wood structural systems. Part 5 of the guide contains some technical considerations for 5- and 6- storey wood buildings is laid out to help designers better understand some of the practical considerations needed for the construction and design of mid-rise wood buildings. It is written for design professionals in the construction industry, and builders with the necessary skills to consider taller wood buildings. This guide is illustrated to be relevant to all design and building professionals involved in building our future environments, including architects, engineers, the development community, material suppliers, manufacturers, building inspectors, municipal officials and planners, project managers, contractors, innovators, and the general public at large.
Manuel de calcul des charpentes en bois 2021
Wood Design Awards, 2020
Surface Flammability and Flame-Spread Ratings
The rate at which flame spreads on the exposed interior surfaces or a room or space can have an impact on the rate of fire growth within an area, especially if the materials of the exposed surfaces are highly flammable. Therefore, the National Building Code of Canada (NBC)¹ regulates the surface flammability of any material that forms part of the interior surface of walls, ceilings and, in some cases, floors, in buildings. Based on a standard fire-test method, the NBC uses a rating system to quantify surface flammability that allows comparison of one material to another, and the ratings within that system are called flame-spread ratings (FSR). For some buildings, the smoke generated by materials or products lining some areas of the building when they burn is also regulated by the NBC. Since it may take some additional time for occupants to exit the building, this applies to all unsprinklered high buildings and all elevators or Group B occupancies in high buildings. The FSR and SDC is also regulated for some materials used in ducts and plenums. The smoke produced from a material or product is measured and quantified through another rating system, based on a standard fire-test method — the smoke developed classification (SDC). For most wood products used as interior finishes, both of these properties — the FSR and the SDC — are to be determined in accordance with CAN/ULC-S102, “Standard Method of Test for Surface Burning Characteristics of Building Materials and Assemblies.”² For flooring, CAN/ULC-S102.2 “Standard Method of Test for Surface Burning Characteristics of Flooring, Floor Coverings, and Miscellaneous Materials and Assemblies is to be used when a SDC or FSR is required.
Fire Separations & Fire-Resistance Ratings
Fire separations and fire-resistance ratings are often required together but they are not interchangeable terms, nor are they necessarily mutually inclusive. The National Building Code of Canada (NBC)1 provides the following definitions: A fire separation is defined as “a construction assembly that acts as a barrier against the spread of fire.” A fire-resistance rating is defined as “the time in minutes or hours that a material or assembly of materials will withstand the passage of flame and the transmission of heat when exposed to fire under specified conditions of test and performance criteria, or as determined by extension or interpretation of information derived therefrom as prescribed in [the NBC].” In many buildings, the structural members such as beams and columns, and structural or non-structural assemblies such as walls and floors, are required to exhibit some degree of resistance to fire in order to prevent the spread of fire and smoke, and/or to minimize the risk of collapse of the building in the event of a fire. However, fire separations are assemblies that may or may not be required to have a specific fire-resistance rating, while structural members such as beams and columns that require a fire resistance rating to maintain the structural stability of a building in the event of a fire are not fire separations because they do not “act as a barrier against the spread of fire.” Requirements for fire separations and fire-resistance ratings are just one aspect of the fire-safe design approach used by the Code to reduce risk to building occupants of injury, as well as to reduce risk of property loss. Together, they are key elements to the strategy of controlling fire spread called “compartmentation.”
Exigences Du Code National De Prévention Des Incendies – Bâtiments En Bois De Grande Hauteur En Cours
Tall Wood Course of Construction Site Fire Safety
The vulnerability of any building, regardless of the material used, in a fire situation is higher during the construction phase when compared to the susceptibility of the building after it has been completed and occupied. This is because the risks and hazards found on a construction site differ both in nature and potential impact from those in a completed building; and these risks are occurring at a time when the fire prevention elements that are designed to be part of the completed building are not yet in place. For these reasons, construction site fire safety includes some unique challenges. Developing an understanding of these hazards and their potential risks is the first step towards fire prevention and mitigation during the course of construction (CoC).
Wood Design Manual 2020
The Wood Design Manual is the Canadian reference on the design of timber structures, under gravity and lateral loadings, according to Part 4 of the National Building Code of Canada (NBC) and the “Engineering design in wood” standard (CSA O86). It provides guidance and design examples on sawn and engineered wood members, their connections and fire design. The most common design situations encountered by practicing engineers are covered through intuitive Selection Tables. In addition, the Wood Design Manual contains the latest CSA O86 Standard, as well as a technical commentary written by timber design experts including members of the Standard’s technical committee. The 2020 Wood Design Manual includes a copy of the CSA O86:19 Standard, incorporating Update No.3 – July 2021. The main changes in this edition are:
Canadian Span Book 2020
This new edition of The Span Book includes added tables for deck joists and beams, more lintel options, and recalculates all spans using revised shear properties.
Wood Design Awards, 2019
Shane Homes YMCA At Rocky Ridge CALGARY, AB
Calgary’s aspirations to become a world-class city are supported by its recent investments in infrastructure and architecture, including the $192-million Shane Homes YMCA at Rocky Ridge, which was bolstered by the largest private donation ever contributed to the local YMCA. Shane Homes is a Calgary-based development company, established in 1979, that contributed $3.5 million for the project. This is the first recreational facility for the northwest corner of the city, serving a community of more than 100,000 residents. Nestled in Calgary’s rolling foothills, the curvilinear design of the Shane Homes YMCA at Rocky Ridge is inspired by the surrounding landscape. The building is sited within a natural park featuring reconstructed wetlands. Multiple pathways and a timber pedestrian bridge curve throughout the site, linking to the regional pathway system. Glulam timber is the primary structural component, allowing for a geometrically complex design at considerably less cost than other materials. The dramatic silhouette is dened by the largest freeform timber roof structure in North America. Construction began in 2014, and since opening to the public in January 2018, this new recreation centre has become a bustling hub of sport and activity. The Shane Homes YMCA has won numerous awards, including a 2019 Wood WORKS! Prairie Wood Design Award, a 2018 Canadian Wood Council Award and a 2017 CanBIM Best in BIM Award.
