Gage-Babcock & Associates Safety Assessment ... - District of Sechelt

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A-9.8.8.1. Required Guards. The requirements relating to guards stated in Part slope of more than 1 in 2. b) the adjacent surface within 1.2 m of the walking surfice has a GBA# 121870 August21, 2012 EFA any building. The Code (letines an unsafr condition as “any condition that could cause undue hazard to life, limb or health oF any person authorized or expected to be on or about the premises.” of Division A states that the Code applies to the colTection ofan unsa/’ condition in or about 3. In addition to the specific requirements o.fJ3CBC Sentence 9.8.8.1 .( 1), Clause 1.1.1.1 .(l)(h) Required Iocotion5 of guards FiqureA H3.I3.J. and consequently where guards would be required include, but are not limited to, not parallel to the walking surface or the surface of the treads or ramps. in exterior settings, surfaces adjacent to walking surfaces, stairs or ramps often are A-9.8.8.5.(l) and (2), A-9.8.8.5.(3) and A-9.8.8.6. sufficiently strong that a person cannot Call through it. Where there is no wall, a additional requirements apply to guards to ensure that a minimum level of protection is provided. These relate to the characteristics described in A-9.8.8.3., the higher surface will obviously prevent such a fall, provided the wall is some kind of barrier to reduce the chances of such a fall. A wall along the edge of Examples of such surfaces where the difference in elevation could exceed 600 mm Consequently, the walking surface, stair or ramp may need protection in some guard must be installed. Because guards clearly provide less protection than walls, landings, porches, balconies, mezzanines, galleries, and raised walkways. Especially guards. This provides little or no protection for the users. That is why the locations but not in others. (See Figure A-9.8.8.1.) Iii some instances, grades are artificially raised close to walking surfaces, stairs or ramps to avoid installing requirements specifr differences in elevation not only immediately adjacent to the construction but also for a distance of 1 200 mm from it by requiring that the slope of injury in a fall from the higher surface is sufficient to warrant the installation of of the ground be within certain limits. (See Figure A-9.8.8.1.) is provided for other than maintenance purposes and the next lower surface, the risk mm or more between two floors, or between a floor or other surface to which access 9 are based on the premise that, wherever there is a difference in elevation of 600 Concordia Homes Subdivision, Sechelt, BC Code Assessment on the Stacked Rock Retaining Walls and Slopes Page 2
Code Assessment on the Stacked Rock Retaining Walls and Slopes Page 3 Concordia Homes Subdivision, Sechelt, BC GBA# 121870 August21, 2012 4. The provisions ofDivision B - Sentence 9.8.8.l.(1), in conjunction with Division A - Clause 1. 1.1. 1.(1)(h) clearly require guards or similar forms of protection where exterior walking surfaces are located within 1200 mm of steep slopes or elevation differences of more than 600 mm between the adjacent surfaces. Sidewalks and patios are considered to be exterior walking surfaces within the context of the Code. Other walkable surfaces, such as lawns, would appear to be outside of the context of Sentence 9.8.8.1 .( 1), but could be considered to be within the context of an unsafe condition if the lawn is located immediately adjacent to a retaining wall or steep slope. Recommendations 1. In general, exterior walking surfaces such as sidewalks, patios, driveways and similar hard surfaces are located at least 1.2 m away from the stacked rock retaining walls and steep slopes, and do not require guards under the provisions of BCBC Sentence 3.8.8.1.(1). 2. At Units 23 and 24, the grade level patios at the rear of the houses are located sufficiently close to retaining walls to constitute a hazard, and require guards or other protection under the provisions of Sentence 9.8.8.1.(1). 3. Lawns and similar spaces that are likely to be occupied on a regular basis should be provided with guards, or other suitable barriers, where required to prevent an unsafe condition at retaining walls and steep slopes. 4. Where landscaping or shrubbery is used to provide a safety barrier adjacent to retaining walls and steep slopes, the plantings should be dense enough to prevent inadvertent access to within 1.2 m of the edge of the wall or slope. Sincerely, GAGE-BABCOCK & ASSOCIATES LTD. Bruce Campbell Senior Consultant I \JI,s ,y Y,r\I2\I 2I 170 (BC) Cocord,a Ifonms\C’orespondenc\Mnnos\LTL0 - Ascsmnt of Retoonng WIIssvpd %cEB
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Gage-Babcock & Associates Safety Assessment ... - District of Sechelt

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