BEARING LENGTH SPAN LENGTH (CLEAR OPENING + 8”) CLEAR OPENING SUPERIMPOSED UNIFORM ULTIMATE LOAD You can access tables from previous editions of the handbook as well as the current edition. As the concrete sets, it bonds to the tensioned steel. Durability is an important concept to consider when it comes to specifying requirements for precast concrete products. Cost effective. EASI-SPAN Buildings have a patented post-tensioned roof and floor system. Spancrete ® hollowcore plank has been used for more than one billion square feet of floor and roof construction worldwide. Products used above or below ground may be exposed to harsh environmental conditions. Visit 5250 Linwood Road or call 941-698-4180. When the concrete reaches a specified strength, the strands are released from the abutments. EASI-SPAN Precast Buildings can be installed in as little as one day, require no foundation, are relocatable and can be fitted at our plant. Starting at a 60” span and reaching up to a 96” free span, these treads offer the ability to create a longer stairway with a seamless look. EASI-SPAN Precast Concrete Buildings. In addition, these precast concrete Steptreads simplify the design and construction of stairways that will become the focal point of your next project. As others have stated, as slabs increase in span they generally need to get thicker in order to develop the lever-arm needed to resist increased bending moment (simply put). The Nitterhouse structural product family includes precast/prestressed concrete beams that provide an exceptionally strong and versatile material suitable for a wide range of applications. It is the most economical way to obtain long spans with minimal depth and a capacity for heavy loads. Load tables are the same for each unit weight. Without durability, the concrete product may deteriorate at a rate much faster than the anticipated life span of 50 to 100 years. concrete: unit weight 100 pcf, compressive strength 3,000 psi or normal weight concrete: unit weight 126 pcf, compressive strength 3,000 psi. Precast Concrete Integral Abutments Topics: Substructure & Foundation Standard abutment construction has the potential to be a long process, so prefabrication provides an excellent opportunity to reduce the overall construction time of a bridge project. The popularity of a prefabricated precast concrete building can be attributed to ease of installation, customizable features and economic return for the property owner. Redi-Span ® ArchBridge System. Timeless in simplicity and grace, proven in efficiency, most surprising in economy, the Redi-Span® Arch Bridge System incorporates three-sided, arch topped, precast concrete elements in spans from 12' to 48'. Precast, Prestressed Hollowcore Plank for Floors and Roofs. Figure 1—Precast Lintel Design Parameters 8” MIN. The following sections from the PCI Design Handbook include interaction curves, load tables, and section properties for various precast concrete components. Check out our different load charts. Our Easi-Set Buildings come available as storage units, dugouts, guardhouses, concessions, utility structures and more. For additional explanations on using these tables, refer to the respective handbook editions. Rapid Construction Conserves Energy Versatility of Design Precast/Prestressed concrete This compresses the concrete, arches the members, and creates a built-in resistance to service loads. Our precast buildings are convenient, cost effective, maintenance free, durable and secure. 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