Difference between pre tensioning and post tensioning concrete pdf

This article is about bands used in packaging. For strips of wood used in furring, see Furring. Difference between pre tensioning and post tensioning concrete pdf article needs additional citations for verification. Please help improve this article by adding citations to reliable sources.

Unsourced material may be challenged and removed. Strapping, also known as bundling and banding, is the process of applying a strap to an item to combine, stabilize, hold, reinforce, or fasten it. The strap may also be referred to as strapping. Strapping is most commonly used in the packaging industry.

Strap is a flexible flat material, most commonly made from steel or various plastics. Steel is the oldest and highest tensile strength strapping. It is available in a variety of widths and thicknesses as well as variations in the grade of steel.

Steel is used for heavy duty holding where high strength and minimal stretch are desired. Surface finishes for steel strap include: paint, paint and wax, bluing or zinc and wax. The wax is used to better transmit the tension around the bundle and for use with certain types of tensioners.

Common applications include steel coils, bundles of metal, baling wire, bricks and pavers, and roll end-binding. Steel Strapping is sold by weight rather than length, due to the natural expansion and contraction of steel in the manufacturing process. 020 Steel Strapping Coil yields approximately 19. Most polypropylene is embossed, some of which is also printed.