It depends on the pattern of the railing. Gentle gradients can be accommodated by decorative railings such as the Terrace and Prospect collections. However linear railings such as Stewart and Stirling are not so well suited. To use these railings on slopes the wall top should be level and then stepped to accommodate the gradient. The railing can accommodate the steps with the use of intermediate posts.
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Or send us an email at sales@heritagecastironusa.com.