What Is Potassium? Potassium is a mineral that, among other things, helps muscles contract, helps regulate fluids and mineral balance in and out of body cells, and helps maintain normal blood pressure by blunting the effect of sodium. Potassium also may reduce the risk of recurrent kidney stones and bone loss as we age.
Racking strength, simply explained, is the ability of a square or rectangular (wall) area to maintain its shape under duress. The picture below (from an old federal document testing racking strength) demonstrates what can happens with stress exceeds a wall's racking strength.acking strength, simply explained, is the ability of a square or rectangular (wall) area to maintain its shape under duress. The picture below (from an old federal document testing racking strength) demonstrates what can happens with stress exceeds a wall's racking strength.
Besides, the values of racking strength and shear modulus for thewall specimens with spruce boards applied horizontally was reduced to 61% and 31%, respectively, if the smaller size ofthe finish board with 0.95cm (t) Ã8.41cm (w) was applied instead.sindicated in Table 2, the values of racking strength for the wood-framed wall sheathed with calcium silicate panel aretwice of those wall sheathed with 12-mm thick gypsum boards, in which are commonly used for noise insulation.