Affordance detection is seen in behaviors such as stair climbing (Warren, 1984) or chair sitting (Mark, 1987). Warren (1984) found that individuals selection of the tallest climbable stair is best described by a nearly, invariant ratio of leg-length to stair-riser height. Rather than fo...
It is easy to take the physics of flight for granted, as well as the ways in which we exploit them to achieve flight. We often glimpse a plane in the sky with no greater understanding of the principles involved than a caveman. How do these heavy machines take to the air? To answer ...
also known as anairfoil. Like drag, lift can exist only in the presence of a moving fluid. It doesn't matter if the object is stationary and the fluid is moving (as with a kite on a windy day), or if the fluid is still and the object is moving...
When descending the same type of open riser steps the toe trap problem doesn't occur. Walking Up Alternating Tread StairsCommon on shipboard where horizontal space is limited, alternating tread stairs have a following among designers who need to jam a stair into a space where there is no ...
2. Write the Tangent Formula Relating the Stair or Step Rise & Run On my drawing I've marked X1, the stair tread depth and I marked Y1as the vertical rise on one step. To build this stair I'll pick a reasonable tread depth X1and will calculate the required step riser height Y1 ...
The maximum allowable stair rise is 7 ¾ inches, and the minimum stair rise is 4 inches. The difference between a stair’s longest and shortest riser height or stair depth should be no more than ⅜ inch. This is quite strict, so take the time to plan your stringers carefully. ...
If you find any high spots, pare them down with a block plane or rasp. Step 3: Install Treads and Risers Susan Pittard Cut the risers to length using a power miter saw for speed and accuracy. Fasten each riser them to the stringers with 2 1/2-in. trim-head decking screws, which...
The stair is 36″ wide, 11″ deep, and 6.75″ high with a 1″ bullnose. Also, these measurements are close to the typical stair size. Obviously, the bullnose represents the part of the tread that hangs over the riser. I used 6 pieces of the bamboo flooring on the mock stair. Each ...
Whether or not you need to strip the existing finish, stair painting involves a fair amount of prep work. In fact, many pros maintain that preparation is 90 percent of a quality job. So get out your palm sander, your paintbrush and your respirator, and get ready to flex your creative mu...
using a hammer and finish nails. Place the risers underneath each step. The riser rests on the front face of the stringers between the bottom edge of the step above and on top of the back edge of the step below. Fasten the risers in place, using finish nails and a hammer. Space th...