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His pioneering efforts and contributions in the areas of Pre-cast concrete, Pre-stressed concrete, alternate low cost construction material, ferro-cement boat building, applications of the Shell design theory in the construction are applied in several key engineering structures in Sri Lanka. [3]
By the 1960s, prestressed concrete largely superseded reinforced concrete bridges in the UK, with box girders being the dominant form. [ 41 ] In short-span bridges of around 10 to 40 metres (30 to 130 ft), prestressing is commonly employed in the form of precast pre-tensioned girders or planks. [ 42 ]
Underslung (lower-beam) launching gantry used for Skyline guideway construction (2015). A launching gantry (also called bridge building crane, and bridge-building machine) is a special-purpose mobile gantry crane used in bridge construction, specifically segmental bridges that use precast box girder bridge segments or precast girders in highway and high-speed rail bridge construction projects.
The Precast/Prestressed Concrete Institute (PCI) published the double tee load capacity calculation (load tables) for the first time in the PCI Design Handbook in 1971. The load tables use the code to identify double tee span type by using the width in feet, followed by "DT", followed by depth in inches, for example, 4DT14 is for 4-foot (1.2 m ...
Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels, floors, roofs, and piles.
The Spancrete Manufacturers Association is an alliance of corporations that own Spancrete machines and produce precast, prestressed concrete. The group was formed in 1960 to promote the use of precast, prestressed concrete products and building systems worldwide.
The precast concrete slab has tubular voids extending the full length of the slab, typically with a diameter equal to the 2/3–3/4 the thickness of the slab. This makes the slab much lighter than a massive solid concrete floor slab of equal thickness or strength. The reduced weight also lowers material and transportation costs.
Access Engineering PLC is a Sri Lankan civil engineering company engaged in the construction industry and supply of construction-related services and materials. [2] The company is one of the constituents of the S&P Sri Lanka 20 Index. [3] The company was founded in 2001, and in 2012 was listed on the Colombo Stock Exchange.