Contract documents always include information about the quality of the finished concrete and the time needed to finish the project. A description about how this information can affect the selection of the formwork system is provided below.
Рубрика: CONCRETE FORMWORK
A building’s structural layout is either uniform ‘‘modular’’ or irregular. Uniform ‘‘modular’’ design is characterized by regular spacing between columns and walls, equal story heights, and regular spacing of cantilevers and openings. Irregular design is characterized by irregular positions of the different structural elements and broken lines or irregular curves in architectural plans.
This system is a combination of the framed-shear wall (type III structure) which acts as an interior tube, and the framed tube (type IV structure), which acts as an exterior tube. The floor structure ties the interior and exterior tubes together to allow them to act as a unit to resist lateral loads. Table 9.1 […]
This system consists of a combination of frames which utilize beams and columns with the shear wall designed to resist lateral loads. Type IV Structure (Framed Tube) This tube is a structural system in which the perimeter of the building, consisting of vertical, closely spaced supports, connected by beams or bracing members, acts as a […]
Table 9.1 Structural Systems and Building Height Structural system Optimum height Rigid frame Shear wall Framed shear wall Framed tube Tube in tube
Systems Buildings are classified as being tall when their height is between two and three times as great as their breadth. For example, a building with a minimum dimension of 50 ft (15.2 m) in plan, and a height of 100 ft (30.5 m) or more is considered a high-rise building. One of the major […]
Vertical supporting structures such as buildings’ cores in high-rise construction, towers, or silos are typically a critical activity that control the pace of the project progress. Consequently, when selecting a core forming system, time is a critical factor. Duration that must be considered are the movement of the form from floor to floor, original assembly, […]
9.1 Factors Affecting the Selection of Vertical Formwork System 9.2 Choosing the Proper Formwork System Using the Comparison Tables A large portion of the cost of the structural frame is the cost of formwork for columns and walls. Typically, the selection of a formwork system is made by a senior member of the contractor’s organization […]
With the advancement of technology in the construction field, limitations of a system or technique are often reduced. The result is increased efficiency in costs and time, versatility, quality, and safety. Every formwork system, including the self-raising forms, has its limitations and range of uses. • Members of the manufacturer’s staff experienced in operating the […]
Safety on the construction site plays an important role in the productivity of the project. It should begin in the planning and management of a project continuing on down to the equipment and the workers. The self-raising forms have a number of safety features. • The self-raising forms are preassembled in a factory-type setting, which […]