The action may be commenced by any one of the heirs at law of the deceased who has sustained a loss by reason of the death. Any heir who does not join as a party plaintiff in the original action but who claims to have been damaged by reason of the death shall be permitted to intervene therein. The action shall be for the exclusive benefit of all of the heirs who has sustained a loss regardless or whether they all join or intervene therein, but the amounts of their respective recoveries shall be in accordance with the subsequent provisions of this article.