The greater fire hazard of many stored goods makes it imperative for building owners to consider more effective methods of warehouse protection. Photograph: Getty Image For warehouse managers, being told they need to install in-rack sprinklers can be stressful. The fire protection benefits are not in question. The problem is the cost. Typically, a large number of sprinklers are required for warehouse storage racks, making the cost far higher than ceiling-level sprinklers. Adding to that, managers worry that in-rack sprinklers could cause water damage to products if they’re set off unintentionally. However, as warehouses grow taller to make more efficient...