Section 28.3 - HALL CALL BUTTONSShall comply with the following:
28.3.1 Call buttons in elevator lobbies and halls shall be centered at 42 inches (42" = 1067mm) above the floor. SeeFig. 28a. Click to view image
28.3.2 Such call buttons shall have visual signals to indicate when each call is registered and when each call is answered.28.3.3 Call buttons shall be a minimum of 3/4 of an inch (3/4" = 19mm) in the smallest dimension. The button designating the up direction shall be on top. Buttons shall be raised or flush.28.3.4 Objects mounted beneath hall call buttons shall not project into the elevator lobby more than four inches (4" = 102mm). Note: The automatic door reopening device is activated if an object passes through either line A or line B. Line A and line B represent the vertical locations of the door reopening device not requiring contact.