DIN 19661-1:1972-10

1 Scope
2 Range of application
3 Definitions
      3.1 Crossing works
             3.1.1 Bridges
             3.1.2 Aqueducts
             3.1.3 Culverts
             3.1.4 Inverted syphons
             3.1.5 Casings
4 Considerations affecting selection of crossing works
5 Characteristics and functions of crossing works
      5.1 Bridges
      5.2 Aqueducts
      5.3 Culverts
      5.4 Inverted syphons
      5.5 Casings
6 Pedological and hydrological principles
      6.1 Quality of soil and water
      6.2 Water resources investigations
             6.2.1 Selection of design flood
             6.2.2 Calculation of design flood
             6.2.3 Consideration of low flows
             6.2.4 Origin of characteristics used
7 Hydraulic investigations
      7.1 Flow process on open reaches
             7.1.1 Hydraulic gradient
             7.1.2 Storage
             7.1.3 Backwater
      7.2 Flow process at crossing works
             7.2.1 Flow process under bridges and aqueducts
             7.2.2 Flow process in culverts, casings and
                      aqueducts
             7.2.3 Flow process in inverted syphons
8 Construction materials
      8.1 Bridges
      8.2 Aqueducts, culverts, inverted syphons, casings
             8.2.1 Selection of construction material
             8.2.2 Pipe joints and seals
9 Structural design
      9.1 Construction methods
      9.2 Bridges
             9.2.1 Alignment of bridges
             9.2.2 Discharge section
             9.2.3 Piers
             9.2.4 Abutments
             9.2.5 Slopes and foreshores
             9.2.6 Bed pitching
             9.2.7 Guard walls in tailwater
      9.3 Aqueducts, culverts, inverted syphons and casings
             9.3.1 General
             9.3.2 Length of structure and flow
             9.3.3 Discharge section
             9.3.4 Panel walls
             9.3.5 Inlet and outlet
             9.3.6 Slopes
             9.3.7 Surface slope
             9.3.8 Bed disposition
             9.3.9 Protection against underflow
             9.3.10 Pipe bedding and cradle
             9.3.11 Pipe cover
      9.4 Special design features of certain structures
             9.4.1 Racks
             9.4.2 Floating beams
             9.4.3 Emergency gates
             9.4.4 De-icing
             9.4.5 Weirs before inlets
             9.4.6 Sump
             9.4.7 Shafts
10 Maintenance and repairs
      10.1 Maintenance
             10.1.1 Maintenance service
             10.1.2 Special structure facilities
             10.1.3 Special equipment
             10.1.4 Routine maintenance
      10.2 Repairs