According to building codes, stairs should be installed at an angle between $30°$ and which of the following angles in standard position?

• A. $37°$
• B. $35°$
• C. $45°$
• D. $50°$

Answer: (B)

Verified step by step guidance

1. Understand that the problem is asking for the maximum allowable angle for stairs installation according to building codes, given that the minimum angle is 30\degree.
2. Recognize that the angle of stairs in standard position refers to the angle the stairs make with the horizontal ground, measured in degrees.
3. Review the given options: 35\degree, 37\degree, 45\degree, and 50\degree, and consider which of these angles is typically accepted as a safe and standard maximum angle for stairs.
4. Recall that building codes usually specify a range of angles to ensure safety and comfort, often between 30\degree and 35\degree or 45\degree depending on the code, so compare these options with common standards.
5. Conclude by selecting the angle from the options that best fits the typical building code range for stair installation angles, which is between 30\degree and the chosen maximum angle.