Note:

Lifting Force per Anchor Formula is used to determine the force exerted on each anchor when lifting precast slabs, ensuring safe load distribution.

Explanation of Parameters:

• G (Weight of the slab): The total weight of the slab in kN. It must be greater than 0 as a slab with zero or negative weight is physically meaningless.
• Hq (Formwork adhesion force): The additional force due to adhesion between the formwork and the concrete in kN. It must be greater than 0 because a zero or negative force implies no adhesion or a repelling force, which is not applicable in this context.
• f (Lifting load factor): A safety factor (typically 1.3) to accommodate overloading. It must be greater than 0 as a zero or negative factor would negate the safety margin.
• z (Cable angle factor): A factor (typically 1.04) based on the cable orientation. It must be greater than 0 as a zero or negative factor would imply no force transfer or an inverted force transfer, which is not applicable in this lifting scenario.
• n (Number of anchors): The number of anchors supporting the lift. It must be at least 2 for stability; a single anchor cannot provide stable lifting.

Real-Life Applications:

• Construction: Lifting heavy concrete slabs safely.
• Infrastructure Projects: Bridges and prefabricated buildings.

Conclusion:

Ensuring precise calculation of lifting force helps avoid overloading anchors, preventing accidents and structural failures.