When calculating the net slab area, which void areas are subtracted?

When calculating the net slab area, which void areas are subtracted?

• A. Left void areas only
• B. Center void areas only
• C. Void areas that are not used
• D. Void areas such as left, center, and right voids

Answer: (D)

Net slab area is the actual area that will be poured with concrete, so you start with the gross slab area and subtract any portions that won’t receive concrete. Voids are openings or spaces left empty in the slab, such as voids for features or services, and they reduce the concrete footprint. When calculating, you subtract all void areas that are not filled with concrete, regardless of where they sit—left, center, or right. Sum of all such voids is subtracted from the gross area to get the net area. So you subtract void areas such as left, center, and right voids.

Net slab area is the actual area that will be poured with concrete, so you start with the gross slab area and subtract any portions that won’t receive concrete. Voids are openings or spaces left empty in the slab, such as voids for features or services, and they reduce the concrete footprint. When calculating, you subtract all void areas that are not filled with concrete, regardless of where they sit—left, center, or right. Sum of all such voids is subtracted from the gross area to get the net area. So you subtract void areas such as left, center, and right voids.