RMS-LB 2018 with 12/20 Revisions

ASD (revised 12/20) 25 ANSI/AARST RMS-LB 2018 (with 1220 revisions) Radon Mitigation Standards for Schools and Large Buildings Figure 6.4 Grey areas cannot contain: Openings in structures, building materials and the breathing space where people congregate or traverse. 6.4.5 Elevation above grade The point of exhaust shall be located not less than 10 feet (3 m) above grade nearest to the point of exhaust and shall be compliant with Section 6.4.3 Directional spread and Section 6.4.4 Straight-line trajectory. 6.4.6 Separation from operable openings in structures The point of exhaust shall be compliant with Section 6.4.3 Directional spread and located either: a) not less than 10 feet (3 m) horizontally to the side operable openings in structures; and b) not less than 4 feet (120 cm) above operable openings in structures. 6.4.7 Separation from people In relationship to exterior flooring surfaces such as decking, patios, sidewalks and exterior corridors where individuals congregate or traverse, the point of exhaust shall be: a) not less than 10 feet (3 m) above or horizontally to the side of exterior flooring surfaces; and b) compliant with Section 6.4.3 Directional spread for an elevation of not less than 10 feet (3 m) above exterior flooring surfaces. Vertical Example 45 Degree Example Straight- line