The following are AAAMSA/SAGGA recommendations for the application of safety glazing materials in balustrading. It is recommended that any balustrade design is confirmed through testing, or is checked by a structural engineer having the appropriate Professional Indemnity Insurance for compliance with the structural requirements of SABS 0160. A balustrade guarding the edge of any balcony, bridge, flat roof or similar place more than 1 m above the adjacent ground or floor level shall be not less than 1 m in height and shall not have any opening that permits the passage of a 1OOmm diameter ball. These requirements also apply to any interior balcony or any mezzanine floor (SABS 0400 -1990 Part D). Balustrading guarding a swimming pool or swimming bath shall not be less than 1,2m high measured from the ground level, and shall not contain any opening which will permit the passage of a 100mm diameter ball. (SABS 0400 -1990 Part D). Glass in balustrading is often applied having two edge support.