Staggered arrangement for round holes. Note that the holes are staggered on 60° angles which makes the bridges the same width. This provides maximum strength and uniform wear.
	Straight arrangement. It is not generally used for screening purposes except for very small holes, but is sometimes preferred for other reasons. This arrangement is also referred to as "on the square."
	Diagonal arrangement for round holes. For screening purposes it is not as efficient as the staggered arrangement shown above because the bridges are not of uniform width.