Hog Slat Inc. Newton Grove, NC USA May 2023 9 Precast Slats Top Tension Cracks Top tension cracks should not extend downward more than 2.25” (6 cm). Cracks should not be more than 0.5 mm in width (as measured with Elcometer Crack Width Ruler) Bottom Tension Cracks Allowed width ≤ 0.5mm, not extend upward more than 2.25” (6 cm) (as measured with Elcometer Crack Width Ruler) Full Depth Cracks Full depth cracks extending across the slat are not allowed End of Slot Cracks Allowed width ≤ 0.5mm. Elcometer Crack Width Rulers are small, inexpensive tools used to measure cracks in concrete. Typically, the ruler is the size and shape of a credit card. They can be purchased online at www.hogslat.com. Part # E143.
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