Transoms shall be installed transversely between standards with couplers fastened to the standards immediately below the ledger. Boarding transoms shall be coupled above the ledgers and spaced as required for planking. Transoms must be 150 mm (6") to 300 mm (12") longer than the width. Transom extensions can be cantilevered to the maximum length required to support 2 planks. Planks on cantilevered transoms shall be secured and provide full contact with the transom to prevent movement or tilting.
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