[See also: Cats and Dogs May See in Ultraviolet] Like the human retina, the canine retina contains other kinds of photoreceptors in addition to cones, called rods. These light receptors do not perceive color, but they are sensitive to light and dark changes, as well as shape and movement. And the ratio of rods to cones in the retina is much higher in dogs than it is in humans.
The distance between rungs, cleats, and steps shall not exceed 12 inches and shall be uniform throughout the length of the ladder. 1910.27(b)(1)(iii). The minimum clear length of rungs or cleats shall be 16 inches.
Measure the distance between your two stringers, depending on how wide you want your steps to be. Remember that the steps hang over the edge of the stringers about 2 on each side. Also measure the distance from the top of your deck past the bottom of the bandboard, measuring 12.Place the top of the joist hanger on your bandboard so the bottom of the hanger is at the 12 mark.easure the distance between your two stringers, depending on how wide you want your steps to be. Remember that the steps hang over the edge of the stringers about 2 on each side. Also measure the distance from the top of your deck past the bottom of the bandboard, measuring 12.