ADVANTAGES OF PRECAST BUILDING SYSTEM
The advantages of precast concrete over steel or cast-in-place concrete make it particularly appealing for projects where schedule and cost-effectiveness are of critical importance. In addition to value, durability and speed-to-market, precast provides flexibility in space planning and increased return on investment. For the general contractor, precast concrete can contribute to the overall sustainability of a building, as well as allow for integrated project delivery that reduces schedule and project costs.
The most important advantage of precast is the opportunity to achieve consistently high quality end products. In recent years, the increasing shortage of skilled workers in Viet Nam has threatened to lower the standard of workmanship in many of our building projects. In precast construction, factory -controlled conditions and the use of state-of-the-art manufacturing techniques enable the desired dimensions, shapes, colours and texture of precast concrete to be more easily achieved. Precasting also makes it possible to inspect the surface finish prior to installation.
Contrary to popular belief, precast concrete does not necessarily restrict design freedom. Diversity of expression and unique buildings can result from custom-made solutions and the intelligent use of industrialised production techniques. A wide variety of forms and shapes are possible with architectural precast concrete. Architects can also select different colours, texture and sizes to fit their aesthetic expressions. Also, precast concrete can harmonise with other building materials.
The economy of precast is maximised with high repetition in production. Careful planning can achieve good repetition in the design without sacrificing design freedom. Economic production leading to lower unit costs can be achieved when the recommended preferred sizes of precast components in this Guide are widely used in the industry. Productivity improvement is possible in the factory through design and tooling innovations. Further cost savings can be derived from the speed of construction. Production of components can proceed while foundation and site work is going on. They can then be erected quickly on site. Delays in concreting due to time required for curing, formwork removal and re -erection can be reduced. Financing cost will also be reduced as a result of the shorter overall construction time.
Another important benefit is the saving of on -site labour. With the elimination of ‘wet’ trades, the need for skilled workers is also greatly reduced. This is especially important in Viet Nam due to our shortage of manpower and the rapidly shrinking pool of skilled workers from traditional sources.
Neater and Safer Sites
The use of precast concrete and other prefabricated components will help to reduce material wastage during construction. The elimination of formwork, scaffolding and ‘wet’ trades means that the site can be cleaner, neater and better organised. This should lead to increased safety.
Maximizing The Benefits Through Teamwork
The advantages of precast can be enhanced when the entire design team and the contractor have the opportunity to jointly develop the project from the initial design stage. The time spent in planning and design always pays off in accelerated construction and consequent cost savings. The Architect and Engineer should therefore seek the advice of the Precaster in the early design stage. Maximum economy, optimum utility and high quality can then be achieved through a coordinated Team effort.