shapes of pre stressed structures
TRANSCRIPT
1. DOUBLE TEE – is considered the most widely used section for prestressed construction with a flat surface having a width that ranges from 120 to 240 centimeters wide. The thickness depends upon the requirements while the span can extend up to 18 meters.
The common shapes of prestressed structural members
are;
APPLICATION
Flat, solid decks in a variety of applications and finishes. Double tee decks for most applications. Up to 130' clear spans are available.
Flat Walls in both solid and integral insulated configurations. These walls can be produced with either standard structural finishes or architectural finishes.
Double tee walls in both solid and integral insulated configurations.
Custom wall shapes or cross sections.
2. SINGLE TEE – is normally used for longer span up to 36
meters with heavier loads.
3. I-SECTION – is widely used for bridges, roof, girders up to 36 meters span.
APPLICATION
To minimize fill requirements and to maintain the necessary under clearance, four 54-inch U-beams were selected in lieu of five 63-inch I-beams for the typical span of 105 feet 8 inches. Judicious use of high strength, high performance concrete, prestressing strands in the top flanges of the beams, spread footings, and semi-integral abutments resulted in economical, durable, and pleasing structures
4. CHANNEL SLAB – is used on bridges of intermediate
and major span.
The bridge is 1224 feet long and crosses approximately 85 feet above the Ashtabula River in Ohio and its floodplain. Originally designed as an eight-span, steel plate girder bridge the bridge was re-designed as a nine-span, prestressed concrete girder bridge through a Value Engineering Change Proposals (VECP) without sacrificing functionality, durability, or aesthetics. The VECP resulted in savings of approximately $900,000 on the project.
APPLICATION
Prestressed solid floor and roof slabs can be produced to any workable size or shape which best suits the job
5. INVERTED TEE SECTION – provides a bearing ledge to carry the precast deck members having a perpendicular direction of span.
APPLICATION :
INVERTED TEE BEAMS
Prestressed Concrete has the capability to produce Multiple sizes of Inverted Tee
Beams for any application
Our modern adjustable
Inverted Tee Beam forms allow more flexibility
than a fixed type of form
Prestressed Concrete Beam
Advantages: •Speed - Minimal formwork requirements•Safety - Immediately after placement provides a secure work platform•Quality - Prestressed concrete is designed to prevent cracking•Design - Shallow structural depth
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