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GEOPAK Road For Bridge Chapter 5.7 COGO Bridge Deck Elevation Commands

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Bridge Deck Elevation Commands Bridge BRIDGE name Profile PROFILE name Tie (positive is to the right) TIE value

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Bridge Deck Elevation Commands Superelevation SE station (R region) LT slope1 dist1 slope2 RT slope1 dist1 slope2 SE sta1 LT s1 dist1 s2 RT s1 dist1 s2 SE sta2 LT s1 dist1 s2 RT s1 dist1 s2 SE sta3 LT s1 dist1 s2 RT s1 dist1 s2

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Bridge Deck Elevation Commands Alignment ALI name Pier PIER BK direction AH direction Pier BK N E AH N 0 E Pier BK AZ AH AZ 37 40

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Bridge Deck Elevation Commands Span Format A SPAN (name) bk_sta ah_sta segments (+) name= the name of the span, bk_sta= the station value for the centerline of the back pier, ah_sta= the station value for the centerline of the ahead pier, segments= the number of equal length segments along the span, and += (optional) calculates elevation on pier ahead.

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Bridge Deck Elevation Commands Span Format B SPAN (name) bk_sta ah_sta segments (+) P Span Format C SPAN (name) bk_sta ah_sta IN v (+) P =elevations are calculated parallel to the pier on bk_sta IN =elevations are calculated at equal intervals v =interval length

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Bridge Deck Elevation Commands Centerline Bearing CB value Positive value indicates a bearing line to the right of the centerline of the pier on the back station. Negative value indicates a bearing line to the left of the centerline of the pier on the ahead station.

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Bridge Deck Elevation Commands Face of Coping Format A FC offset_left offset_right Face of Coping Format B FC pa, pb offset_right Elevations are calculated along a line concentric to the baseline at offset distances, left and right. Elevations are calculated along a line to the left of the baseline from pa to pb and along a line to the right concentric to the baseline at the offset distance.

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Bridge Deck Elevation Commands Face of Coping Format C FC pa, pb pi, pj Face of Coping Format D FC offset_left pi, pj Elevations are calculated along a line to the left and concentric to the baseline at the offset distance and along a line to the right from pi to pj. Elevations are calculated along a line to the left of the baseline from pa to pb and along a line to the right of the baseline from pi to pj.

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Bridge Deck Elevation Commands Gutterline The GU commands calculate deck elevations along the gutterline of the current span. It uses the same four formats as the FC Command.

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Bridge Deck Elevation Commands Beam Format A BEAM OFF offset1 offset2 offset3... offsetn Beam Format B BEAM PAR pa, pb beam_spacing number_of_beams Negative offsets are to the left of the baseline and positive offsets are to the right. The beams are laid out parallel to the line from pa to pb, which defines the location of the left most beam. The value beam_spacing designates the spacing between the beams with the value number_of_beams indicates the number of beams.

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Bridge Deck Elevation Commands Beam Format C BEAM BY POI pa, pb Beam Format D BEAM pe, pf FROM n1 SPS v1 n2 SPS v2... TO m1 SPS w1 m2 SPS w2... Locates a single beam running from pa to pb. The line from pe to pf locates the left most beam with the other beams located along the back (FROM) pier at n1 spaces of length v1, n2 spaces of length v2… and located along the ahead (TO) pier at m1 spaces of length w1, m2 spaces of length w2….

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Bridge Deck Elevation Commands End Span (initiates the elevation calculations) END SPAN Edit Text (writes table of elevations to text file) EDIT TEXT bridge-span.TXT The accuracy of the elevations is controlled by the COGO distance decimal setting. Elevation at previously stored points POI/EL list

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Bridge Deck Elevation Commands Example:

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