Foreword
Introduction
1 Scope
2 Normative references
3 Symbols and abbreviated terms
4 Parameters for deflection calculations
   when using an ATV-A 127 type design system
   4.1 Initial deflection
   4.2 Long-term deflection calculated using
        an ATV-A 127 type design system
5 Soil parameters, strain coefficients and shape
   factors for flexural strain calculations
   5.1 For equations used in ATV-A 127 type
   design systems
   5.2 Shape factor, D[f]
6 Influence of soil moduli and pipe stiffness on
   pipe buckling calculations using ATV-A
   type design systems
   6.1 Elastic buckling under internal negative
   pressure for depths of cover over 1 m
   6.2 Long-term buckling under sustained external
   load
   6.3 Value for S[O]
7 Parameters for rerounding and combined loading
   calculations
   7.1 Rerounding
   7.2 Combined effects of internal pressure and
   external bending loads
8 Traffic loads
   8.1 General
   8.2 Influence on allowable initial deflection
   8.3 Soil pressure from traffic loads
9 Influence of sheeting
10 Safety factors for gravity pipes and pressure
   pipes
   10.1 Gravity pipes
   10.2 Pressure pipes
   10.3 Safety factors in buckling calculations
Annex A (informative) - Soil parameters
Annex B (informative) - Determination of concentration
        factors used in ATV-A 127
Annex C (informative) - Loading coefficients used in
        ATV-A 127
Annex D (informative) - Horizontal bedding correction
        factors
Annex E (informative) - Selection of long-term stiffness
Annex F (informative) - Partly residual soil friction
        used in ATV-A 127 type calculation systems
Annex G (informative) - Application limits for GRP
        pressure pipes installed underground
Bibliography