Handbook for Public Playground Safety 49 B.2 Test Methods B.2.1 Determining whether a projection is a protrusion B.2.1.1 Test procedure Step 1: Successively place each projection test gauge (see Figure B1) over any projection Step 2: Visually determine if the projection penetrates through the hole and beyond the face of the gauge (see Figure B11 below). Pass: A projection that does not extend beyond the face of the gauge passes. Fail: A projection that extends beyond the face of any one of the gauges is considered a hazardous protrusion and should be eliminated. B.2.2 Projections on suspended members of swing assemblies Given the potential for impact incidents, projections on swings can be extremely hazardous. A special test gauge (see Figure B2) and procedure are recommended. When tested, no bolts or components in the potential impact region on suspended members should extend through the hole beyond the face of the gauge. B.2.2.1 Test procedure Step 1: Hold the gauge (Figure B2) vertically with the axis through the hole parallel to the swing’s path of travel. Step 2: Place the gauge over any projections that are exposed during the swing’s path of travel. Step 3: Visually determine if the projection penetrates through the hole and beyond the face of the gauge. Pass: A projection that does not extend beyond the face of the gauge passes. Fail: A projection that extends beyond the face of the gauge is considered a hazardous protrusion and should be eliminated. B.2.3 Projections on slides To minimize the likelihood of clothing entanglement on slides, projections that (1) fit within any one of the three gauges shown in Figure B1 and (2) have a major axis that projects away from the slide bed should not have projections greater than 1/8 inch perpendicular to the plane of the surrounding surface (Figure B12). B.2.3.1 Test procedure Step 1: Identify all projections within the shaded area shown in Figure B13. Step 2: Determine which, if any, fit inside the projection test gauges (Figure B1). Step 3: Place the swing and slide projection gauge (Figure B2) next to the projection to check the height of the projection. APPENDIX B: PLAYGROUND TESTING Figure B11. Determining whether a projection is a protrusion
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