![]() In addition, local building codes may require a design prepared by a design professional. Building permits may be required for shorter walls if they support a surcharge load. Segmental retaining walls fall under the requirement of the International Building Code, Section 105.2, which requires a building permit for earth retaining structures which are over 4 ft (1.2 m) in total height. Reinforced SRWs in excess of 50 ft (15.2 m) have become more common and terraced and single-height retaining walls in excess of this height have also been constructed. Engineered strength, achieving height without geogrid. Can be colour at source or on-site to match different local environments. Aesthetically pleasing, with the look of natural stone. When the maximum height of the gravity SRW system is not sufficient, the design engineer should consider using a reinforced structure and incorporate geosynthetics.Ģ) Reinforced Walls – Reinforced segmental retaining walls have no theoretical maximum height when properly designed. The interlocking concrete blocks do not need cement, so can be laid in any weather. Unreinforced SRWs typically can be built up to 3 to 4 ft (1.0 – 1.2 m) high, or less if poor soil conditions or surcharges loads are present. As always, consult with a qualified SRW designer for project- specific considerations.ġ) Gravity Walls – The height of unreinforced segmental retaining walls (gravity walls) depends on the SRW unit depth (front to back), weight of the individual unit, face batter, soil properties, and loading conditions. ![]() ![]() The following discussion provides general guidance and recommendations to consider when planning a SRW project. This includes the bottom portion of the wall that extends below the finished grade. The height of a segmental retaining wall is measured from the top of the leveling pad to the top of the uppermost SRW unit (not including the cap).
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