Section modulus top and bottom. Evaluate alignment accuracy under a microscope Figure 4. Industrial Metal Shelving. Check our Monthly Deal. The tensile stress in the prestressing steel shall not exceed the values specified in ACI Carbon nanotubes properties of glass In industrial glass: Driving criteria. Copyright by Refsnes Data. Concrete and masonry foundation walls that are laterally supported at the top and bottom shall be permitted to be designed and constructed in accordance with this section.