What are two advantages of precast hollow core concrete planks?

There are several advantages of the precast hollow core slab or prestressed hollowcore slab such as: heavy weight capacity, exceptional fire resistance, lower self-weight, superior acoustic insulation and thermal properties, cost-effective construction solution, offers better designing flexibility to builders , rapid …

What is precast hollow core?

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.

How thick are concrete planks?

4 to 6 inches
Most specifications for retail or commercial concrete slabs specify 4 to 6 inches of thickness. Owners and contractors have historically disputed whether a poured slab meets a specification because of its thickness.

How wide are hollow core planks?

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 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.

Are hollow core slabs strong?

The slabs are made of two materials, the properties of which are taken almost to the extreme. Firstly, concrete: general wet cast concrete strength is C20 / 25, while hollow-core concrete strength is C40 / 50-C50 / 60. That is, more than twice as strong.

Why are hollow core slabs used?

By design, hollow-core slabs can intake and store cooler nighttime air, then release it when required. The slab acts as a thermal ‘battery,’ which can harness free cooling when available, and can be mechanically charged at night when conditions are more favourable (i.e. when the sun is down and lights are off).

How far can hollow core slab span?

6-inch depth hollowcore plank: 22-foot spans. 8-inch depth hollowcore plank: 29-foot spans.

How thick should concrete be for heavy equipment?

Six inches of thickness should be more than adequate for areas where heavy equipment will be driven and parked. For lesser loads, four inches.

How much weight can a 12 inch concrete slab hold?

Determine the Pad’s Thickness For example, a 6-inch pad with a compression strength of 700 psi can support 1,105 psi. If it was 7 inches thick, it could support 1,194 psi, and if it was 12-inches thick, it could support 1,563 psi.

What is hollow core wood?

Hollow core doors are fiberboard or laminated wood doors that are much like long, flat boxes that are mostly hollow inside. At key points within the door are cardboard honeycomb spacers that help the door maintain its structure. The edges are made of MDF or softwood such as pine.

How much do precast concrete panels cost?

To create precast concrete, manufacturers pour concrete into a mold and create a panel. Rather than having a truck come to your property to pour onsite, specialists lift these panels into place. A prefab concrete wall costs most homeowners between $1,650 and $8,000. Prefabricated concrete is another word for precast concrete.

How to make precast concrete slabs?

Precast concrete is a construction product produced by casting concrete in a reusable mold or “form” which is then cured in a controlled environment, transported to the construction site and lifted into place (“tilt up”). In contrast, cast-in-place concrete is poured into site-specific forms and cured on site. Precast stone is distinguished from precast concrete using a fine aggregate in the

How strong are precast concrete walls?

Strict quality control programs

What is precast unit concrete stair?

Advantages. Unlike concrete steps poured on site,our precast concrete steps are manufactured within our production plant.