For typical multi-column bridges, determine design loads for foundations at Service I Load Combination. Determine foundation loads for single column bents and other non-typical substructures using Service I and Service IV Load Combinations. For Service IV Load Combination, include the vertical wind pressure as specified in Article 3.8.2. For foundation loads on typical multi-column bents and abutments, distribute the live load equally to all supporting foundations, assuming all lanes are loaded. Use the multiple presence factor, m, per Article 3.6.1.1.2.