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<br />9. BRIDGE CARDS: SB & BT <br /> <br />These cards are utilized to input data for bridge analysis by the <br />normal bridge and the special bridge methods. <br /> <br />SB: Special Bridge Card. This card is required to input coefficients <br />for pier shape, orifice flow and weir flow for use by the special bridge <br />method. Geometric properties of the bridge such as weir length, width <br />of piers, and net area of the opening of the bridge can also be input <br />on the 5B card. <br /> <br />BT: Bridge Profile Card. The BT card is used to input bridge <br />geometry for both normal bridge and special bridge analysis. For analysis <br />by the normal bridge method, BT cards are utilized to describe the flow <br />areas of the cross section that are blocked out by the bridge piers, <br />bridge deck and approach fill. For the special bridge method the BT <br />cards are used to define the weir profile. <br /> <br />29 <br />