How much does a hollow core slab cost?
Maximize space in any house plan for approximately $20 per square foot with Hollowcore Roof and Floor Systems from County Materials. Hollowcore systems are prestressed concrete plank that serve as both a readymade sub floor for a garage, and a ceiling for additional living areas.
How far can hollow core slab span?
6-inch depth hollowcore plank: 22-foot spans. 8-inch depth hollowcore plank: 29-foot spans. 10-inch depth hollowcore plank: 35-foot spans. 12-inch depth hollowcore plank: 40-foot spans.
What is hollow core precast concrete?
A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction of floors in multi-story apartment buildings.
What is the purpose of hollow core?
Hollowcore slabs derive their name from the voids or cores which run through the units. The cores can function as service ducts and significantly reduce the self-weight of the slabs, maximising structural efficiency.
Are hollow blocks cheaper than precast?
There are advantages and disadvantages to both methods. Using hollow blocks can be cheaper, easier, and faster to install, given that you have skilled masons who have years of experience on the job.
What are the advantages of using hollow core?
Advantages of Prestressed Hollowcore
- Speed of Erection. Hollowcore slabs can be installed quickly and safely on-site in variable weather conditions, unlike in-situ concrete.
- Lower Material Usage. Hollowcore slabs are prestressed.
- Long Spans.
- Structural Efficiency.
- Sustainable.
- Quality.
- Lightweight.
- Diaphragm Action.
How far apart can concrete columns be?
What is the maximum and minimum distance between reinforced concrete columns? The maximum span between columns for normal structures is 7.5 m and minimum spacing is 2.5 m.
How far can columns span?
The normal spacing among two columns is 5 meter or 16.40 feet. The maximum spacing among two columns is 7.5 meter or 24 feet. (Since 1 meter is similar to 3.28084 feet). The minimum spacing among two columns is 2 to 3 meter or 5 to 7 feet.
How wide are hollow core slabs?
The planks are manufactured on 500-foot-long steel beds in standard widths of 48 inches and thickness of: 8, 10, 12 and 16 inches.
What is bubble deck slab?
Bubble deck slab is a hollow, flat slab that spans in two directions, in which plastic balls are incorporated to replace, and therefore eliminate the concrete in the middle of a conventional slab which does not contribute to its structural performance.
Which is better hollow blocks or precast?
Since the compressive strength of reinforced concrete is greater than that of concrete hollow block, therefore a reinforced concrete panel is stronger and more resilient than a concrete hollow block.