Determine the slope of the stairs should be taken into comfortable walking, climbing efficiency and space state factors. The leading edge of bench stepping-line levels of each point is called the slope line. The angle between the horizontal line and the slope is the slope of the staircase (called the tangent of the angle of gradient of the stairs). Interior stairs slope is generally 20 degrees -45 degrees is appropriate, the best slope of about 30 degrees. Stairs requires special function slope varies. For example ladder slope above 60 degrees, special stairs and generally 45 degrees -60 degrees, indoor and outdoor stairs slope of 14 degrees -27 degrees, the slope of the ramp is usually below 15 degrees. In general, the larger flow, higher safety standards, or even larger than ample spaces should be gentle slope some stairs, only a few people use or not frequently used by the stairs, steep slope can be more, but preferably not exceeding 38 degrees.
Previous：Stair handrail height specification