The surface area of a rectangular prism with dimensions 16ft x 5ft x 14ft can be calculated using the formula:
Surface Area = 2(lw + lh + wh)
Plugging in the values, we get:
Surface Area = 2(16*5 + 16*14 + 5*14) = 2(80 + 224 + 70) = 2(374) = 748 sq ft
Therefore, the surface area of the rectangular prism is 748 square feet.