»  How far can I span without a beam?
»  What design load do I need for my building?
»  What thickness of Spancrete® hollow core plank do I need?
»  Where can I cut holes in my Spancrete® hollow core plank?
»  How do I cut holes in my Spancrete® hollow core plank?
»  How do I anchor to the underside of my Spancrete hollow core plank?
»  How do I support my Spancrete® hollow core plank?
»  How do I connect to a block/concrete masonry unit (CMU) wall?
»  How do I connect to steel?
»  Where do I find connection details?
»  Can I put a wall or column on my Spancrete® hollow core plank?
»  Do I need to fill the core ends?
»  How can I finish the underside of my Spancrete® hollow core plank?
»  How do I finish off the top of my Spancrete® hollow core plank?
»  What is the specification for structural topping?
»  How much would Spancrete® hollow core plank cost for my project?
»  In what sizes is Spancrete® hollow core Plank offered?
»  What is prestessed concrete?
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»   What is pre-stessed concrete?

Reinforced concrete members must carry their own weight as well as any applied loads. This means that conventional reinforced concrete planks must have short spans and thick section depths. Pre-stressing of precast concrete planks overcomes this limitation. In pre-stressing, high-tensile steel strands are stretched between abutments at each end of casting beds. Concrete is then placed to encase the strands. As the concrete cures, it bonds to the tensioned steel. When the concrete has reached a specified strength, the tensioned strands are released from the abutments. This exerts pressure upon the lower portion of the member, which stresses the concrete, and in effect relieves the precast plank from the need to support or carry its own weight. This pre-stress force gives Spancrete Hollowcore plank its slight upward arch or camber.

Span Notes (stored as PDFs):

Advantages of prestressed concrete

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