Abstract: Volume-changing clay subsoils constitute the most costly natural hazard to buildings on shallow foundations in Canada and the United States. In the Prairie Provinces alone a million or more Canadians live in communities built on subsoils of very high potential expansion. In eastern and coastal regions even larger populations are situated on clays of high shrinkage potential. This Digest describes new concepts and details developed from a continuing study of the subject and discusses the selection of appropriate foundations.
Abstract: Buckling and spalling of brick veneer and brick facing wythes of cavity walls on highrise buildings are attributable to building movements. In some instances the facing of whole panels has fallen off. It is the purpose of this Digest to discuss characteristics of failures observed in a number of buildings and to comment on particular details of the forms of construction that tend to contribute problems.
Abstract: This Digest discusses the general problem of design and construction of office partitions to control noise between offices. Some examples are given of practical installations for partitions, ceilings, doors and windows.
Abstract: Several non-destructive methods of assessing the strength of concrete in buildings have been developed. The purpose of this Digest is to describe these methods briefly, outlining their advantages and disadvantages.
Abstract: High losses of mobile homes in windstorms have become a matter of considerable concern to owners, insurance companies and building code authorities. The purpose of this Digest is to assess the nature of the wind loss problem, to describe the effects of the wind forces on a typical mobile home and to suggest methods of providing greater safety by anchoring mobile homes to the ground.
Abstract: Spontaneous ignition, a cause of unwanted fire, is a complex phenomenon of combustible material ignited by its own heat of reaction without external heat or other source of ignition. The purpose of this Digest is to outline the factors responsible for spontaneous heating and ignition and the laboratory methods available for studying the problem. A list of materials with a tendency towards spontaneous ignition is included.
Abstract: The comfort and safety of the users as well as the efficiency of operation are important considerations in elevator design. The special requirements for elevator use by disabled people, for the delivery of furniture and equipment, and for use in emergencies, are discussed. Guidance is given for the size and number of elevators required.
Abstract: Despite wide use of chemicals to control snow and ice on sidewalks, at store entrances, and on roadways and parking lots, there is much misunderstanding of their proper application. It is the purpose of this Digest to outline the general principles and practice of chemical control for those building superintendents, maintenance engineers, or landscape designers who may not be aware of the technical information available on this subject.
Abstract: Artificial lighting in office and school buildings is a major and conspicuous consumer of electricial energy. In addition, air conditioning consumes energy and may be required to remove the heat generated by lamps. Energy consumption is measured as the product of power input ( kilowatts) and the period of use (hours). To reduce it both input and hours of use must be controlled. Power input may be reduced by lowering general illumination levels, adopting selective lighting standards, and replacing inefficient sources. Hours of use can be reduced through sensible switching arrangements and automatic light control that takes advantage of available daylight and space occupancy.