Mount signs to these rugged posts. Posts can be set in ground, concrete or portable base. U-Channel posts have 3/8" holes on 1" centers along the length. Posts are 2 lb. per foot. Approved by the Federal Highway Administration (FHWA) by meeting the NCHRP-350 criteria. Note: 10-ft and larger posts are required to ship via truck. Shipping charges will be applied based upon weight and zone. Installation kit can be purchased.