Yes, as long as you use a support bracket every 4 feet. The 2006 IBCi Section 1607.7 describes Loads on handrails, guards, grab bars and vehicle barriers as follows: According to Section 1607.7.1 Handrails and guards, “Handrail assemblies and guards shall be designed to resist a load of 50 plf (0.73kN/m) applied in any direction at the top and to transfer this load through the supports to the structure.” The IRC also prescribes that only the single concentrated load as required by Section 1607.7.1.1 shall be applied. According to Section 1607.7.1.1 Concentrated load, “Handrail assemblies and guards shall be able to resist a single concentrated load of 200 pounds (0.89 kN), applied in any direction at any point along the top, and have attachment devices and supporting structure to transfer this loading to appropriate structural elements of the building.”