UNI EN 12056-3 : 2001

Foreword
1 Scope
2 Normative references
3 Definitions and symbols
      3.1 Definitions
      3.2 Symbols
4 Runoff calculations
      4.1 Quantity of rainwater runoff
      4.2 Rainfall intensity, r
      4.3 Effective roof area, A
5 Hydraulic design
      5.1 Eaves gutters
      5.2 Valley and parapet gutters
      5.3 Gutter outlets
      5.4 Flat roof outlets
6 Rainwater pipes
      6.1 Part filled (non-siphonic systems)
      6.2 Siphonic systems
      6.3 Drains
      6.4 Connection to sanitary pipework
7 Layout
      7.1 General
      7.2 Gutters
      7.3 Outlets
      7.4 Emergency outlets
      7.5 Access
      7.6 Pipework
      7.7 Trace heating
      7.8 Change of building use
ANNEX A (NORMATIVE) TESTING OF GUTTERS AND OUTLETS
      A.1 - Capacity of gutter and outlet in combination
      A.2 - Capacity of gutter
      A.3 - Capacity of gutter outlet
ANNEX B (INFORMATIVE) NATIONAL AND LOCAL REGULATIONS AND
                      PRACTICE
ANNEX C (INFORMATIVE) CAPACITY OF DRAINS
ANNEX D (INFORMATIVE) LOGIC DIAGRAMS

Applicable to wastewater drainage systems, which operate under gravity.