Architectural · A-ZQ5GR

OSHA Guardrail Post Base and Roof Penetration Detail

Materials

Steel Metal (misc.)

Elements

Columns Railings / Guards Roofs Waterproofing / Flashing Connections / Plates Roof / Floor Openings

Connections

Base Plate / Anchorage HSS Connection Welded Connection

About this detail

An OSHA-compliant guardrail assembly mounts on a roof deck, featuring a two-by-one-inch by three-sixteenths-inch hollow structural section steel baluster post and rails spaced at six feet on center. The hollow structural section post transitions to a three-inch diameter steel post supported by a quarter-inch steel baseplate fully welded at the transition. The assembly penetrates the roof system, utilizing a PVC boot flashing at the post base sealed with a sealant bead and a base membrane flashing tacked under the flashing with a hot-air weld. A two-inch round base plate is fastened with a minimum of three fasteners per penetration, with ballast placed around the penetration where the roof level varies. All exterior exposed steel not visible to the public view receives a hot-dipped galvanized finish, including special preparation and priming requirements.

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