CHAPTER 3: BUILDING BLOCKS
TECHNICAL
302.3 Openings.
Openings in floor or ground surfaces shall not allow passage of a sphere more than ½
inch (13 mm) diameter except as allowed in 407.4.3, 409.4.3, 410.4, 810.5.3 and 810.10.
Elongated
openings shall be placed so that the long dimension is perpendicular to the dominant direction of travel.
303 Changes in Level
303.1 General.
Where changes in level are permitted in floor or ground surfaces, they shall comply with
303.
EXCEPTIONS:
1.
Animal containment areas shall not be required to comply with 303.
2.
Areas of sport activity
shall not be required to comply with 303.
303.2 Vertical.
Changes in level of ¼ inch (6.4 mm) high maximum shall be permitted to be vertical.
Figure 302.3
Elongated Openings in Floor or Ground Surfaces
Figure 303.2
Vertical Change in Level
2010 Standards: Titles II and III
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105
Department of Justice