When estimating drywall you will also need to know how many screws are needed. To determine the pounds of screws required will be made by dividing the square footage of drywall by 300. This is how many pounds of 1-1/4 inch drywall screws are needed. Generally, you will need about 5-6 pounds of nails for every 1000 square-foot, depending on how the drywall is being installed.
Necking, in engineering or materials science, is a mode of tensile deformation where relatively large amounts of strain localize disproportionately in a small region of the material.[1] The resulting prominent decrease in local cross-sectional area provides the basis for the name neck. Because the local strains in the neck are large, necking is often closely associated with yielding, a form of plastic deformation associated with ductile materials, often metals or polymers.
Toward a Better Definition of Neck Tension. As a convenient short-cut, we tend to describe neck tension by bushing size alone. When a guy says, âI run .002 neck tensionâ, itâs safe to assume he is using a die/bushing that sizes the necks .002â³ smaller than a loaded round.