Technical information The new standard DIN 1986-100 Planning and execution of drainage systems The updated version of the standard DIN 1986-1 !as released in "ay #8 $ drainage systems for %uilding and land - provisions in connection mitDIN &N '(# and DIN &N 1#(6 )* The revision of DIN 1986-1 !as re+uired in particular %y ne! re+uirements and possi%le solutions in the area of rain drainage* In addition, it !as to create a compact set of rules !hich include all essential regulations for the practice again for the planning and execution of drainage systems in ermany* .e+uirements of the &uropean standard DIN &N '(# and DIN &N 1#(6 are re+uired only in exceptional cases* Changes
DIN 1986-1, "arch ## issue !ere made the follo!ing changes/ a0 ne! structure, in %asic re+uirements for the planning and execution of the units to the dirt and rain!ater, 2aying of se!er pipes, inside and outside %uildings, .e+uirements for !ater +uality and +uantity, Protection against %ac3 pressure, Design of e+uipment for the dirt and rain!ater, in particular the rain!ater is much enhanced %y the design of roof flo!s, rain gutters, emergency drainage systems, drainage of roof siphonic, rain restraint and leadership of flood proof4 5%0 the re+uirements of DIN &N 1#(6, part 1- and part DIN &N 1#(6, part 7 ta3en into account as !ell as DIN &N '(#* 5c0 the rain series in ermany, referred to in nnex have %een in accordance acc ordance !ith :;T. D
The DIN &N 1#(6 applies only to )Drainage systems) !ithin %uildings* The scope of the DIN &N '(# )drainage systems) outside of %uildings extends on the drainage and the pu%lic se!age to the se!age treatment plant* The authoritative in ermany standard DIN 1986-1 is still for the %uilding and land drainage, i*e* up to the %oundary* %oundar y* =or =or the pu%lic sector, the DIN is &N '(#* 2egally, the the %oundary forms the %oundary %et!een the %uilding regulations and the pu%lic sector in ermany*
Derivation of different waste types
The mixing system, rain and !aste !ater through separate case are deduce collection or ground ca%les from the %uilding* The reason - or collectors need to %e merged for hydraulic reasons outside of the %uilding as close as possi%le to the connection channel on the site %oundary* The The merger should %e carried out in a shaft !ith an open flo!* In exceptional cases, for example in border development, a combination of dirt and rain water pipes inside the bildin! is permitted onl" the oter wall of the bildin!# In accordance with the new comment to the standard rain water $asic or %DN manifolds shold 1&0 in the case of the border development development with an own connectin! cable are connected to the pblic channel of the mixin! water, so that the land receives a connection for dirt and one for rain water to the mixin! water channel# This version is mch reliable
Waiver of underground pipes within buildings
.easons of the inspection and the simpler possi%ility of reha%ilitation, underground pipes should %e avoided and instead moved as collectors !ithin %uildings* This does not apply to %uildings !ithout cellar* Ta3ing Ta3ing into account the cost of initial and recurring testing of underground pipes, !hich serve the preventive soil and !ater protection, it is already useful refrain underground pipes in the %uilding, and instead to install interceptors in the %asement %elo! the ceiling or !alls, or alternatively in pipe ducts in the %asement floor* Initially intended as a scheme for ne! and reconstructions, this installation !ay !ins more and more in importance the management ma3eover* t t the During the renovation of roofs, the drainage capacity of the existing drainage system must %e chec3ed* ;imilarly, it is to ma3e sure emergency drainage systems are availa%le, sufficient and properly arranged* This is !orth noting/ assuming > private underground pipes from a loss ratio of 7-8* In addition to the usual reha%ilitation procedures, such as using liner, the possi%ility of a%andoning the old underground pipes and to replace !ith ne! installation of manifolds is often cellar %uildings* This type of renovation of underground pipes is no! %y many ur%an drainage facilities
Ventilation Ventilation of drainage systems
In the area of ventilation, drainage systems, some additions have %een made during the revision of the standard* There are clear instructions regarding the loading and air removal from ground!ater and collectors in the ne! DIN 1986-1* To do this, it is said/ )at least a ventilation pipe DN ' roof must %e carried for the ventilation and exhaust the %ase ? collectors in systems !ithout case lines*
In the future, the installation of ventilation valves as a replacement for main ventilation lines not only on single - and t!o-family homes is limited, if at least one case line via the roof, %ut also in technical drainage compara%le use units !ith only domestic se!age* The compara%le unit of use here means that the pipe siEe and the num%er of drainage items of a smaller non residential %uilding should correspond to a single or t!o family house* entilation valves are must %e installed such that they can %e exchanged in the event of failure !ithout structural measures* =or sufficient air access is to ensure* Design of wastewater systems
ermany pipe!or3 must %e calculated continue to system 1* The system 1 corresponds to individual ca%le systems !ith partially filled ca%les !ith a filling level of h?d i F !ere t the %ases for !aste !ater plants, plants, virtually no changes have occurred* The rules including the corresponding ta%les for each management area, such as single and manifold lines, do!n pipes !ith main ventilation, collection and underground pipes are no! consistently included in the DIN 1986-1* Thus the constant change %et!een DIN is no longer re+uired &N 1#(6-# and DIN 1986-1 in the design of !aste !ater pipes* Gere is the design of do!n pipes !ith side ventilation the only exception* Do!n pipes !ith side ventilation are still measured according to ta%le 1# DIN &N 1#(6-#* Planning requirements for rain drainage systems
In the planning and design of rain drainage system primarily all possi%ilities of decentralised storm!ater management, such as for example the storage and use, leaching or introduction in an a%ove-ground !ater should %e used in accordance !ith DIN 1986-1, to sustaina%ly reduce the discharge of rain !ater into the pu%lic se!er system* In many areas of the =ederal .epu%lic of ermany, strong overload of the pu%lic channels arises from the continuous expansion of the Ae%auungeine* The construction or expansion of pu%lic channels is often not possi%le for financial reasons* "any cities and to!ns therefore fully or at least partially deny the discharge of storm!ater from the land into the pu%lic se!er system* The application of decentralised rain!ater management in ermany gains more and more importance due to the descri%ed pro%lems* Rain donations
To determine of the necessary rain donations, the values can %e used after :;T. D
Bhanges to the example of the city of Bonn/ Bonn r !"# #$$ l % &'s ( ha) Bonn r !"! #** l % &'s ( ha)
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old new
The annuality of calculation rain for land 5except the roof0 must %e for precipitation areas !ithout planned retention of rain at least once in # years 5T F #0 are* =or a prescri%ed period of rain from D F ( minutes a calculation rain donation must for these areas continue r (*# %e %rought in approach* Bhanges to the example of the city of Aonn/ Bonn r !"# #$$ l % &'s ( ha) Bonn r !"# #+! l % &'s ( ha)
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old new
Discharge affecting surface The roof area proHected in the plan is considered effective roof area in ermany in eneral*
t greater rising facades !ith exposure to !ind, the Planner has to chec3 that is to %e expected !ith an influence on the rain !ater drainage in the de!atering system* If this is the case, the effective surface in accordance !ith DIN 1#(6- must %e calculated* This !ill %e the total area of the facade rising to (> as effective area* The outflo! of effective plot is to calculate from the outdoor unit plan, ta3ing into account the discharge coefficients* Roof drains Design of rain water pipes 'free mirror drainage)
The %ases for rain drainage system in the free mirror system are no! fully included in the ne! DIN 1986-1* In principle, only roof drains may %e used, meeting the re+uirements of DIN &N 1#(-1 unless there is a general approval 5AJ0 or a general %uilding code test certificate 5AP0* The manufacturer must provide the drainage capacity roof drains in dependence on the pressure level in the form of a ta%le or a chart* The specification for roof drains mutatis mutandis also apply to ttica -, gutter and emergency procedures and emergency spills* Bonnection ca%les are to measure, !here%y the nominal diameter must not %e less than the nominal diameter of the roofing process such as manifolds* "anifold lines must %e siEed such as manifolds* Thus, a maximum degree of filling of h?d is single and manifold lines i F *' and a minimum gradient of @ F to consider *( cm ? m*
Do!n pipes are allo!ed up to a maximum degree of filling of f F * are measured* The do!n pipe must have no lo!er nominal siEe as the connection nominal !idth of connected roof expires or the manifold pipe* Base management delays K1 C need the siEing are not considered*
,cheduled filled roof drainage system
The entire execution and design principles for systematically filled roof drainage system !ith ;iphonic, !ere compiled so far only in the DI guideline 86 contained no! in the DIN 1986-1* The latest findings from the practice !as ta3en into account in the re+uirements and provisions for this particular type of roof drainage*
-mergency drainage
&mergency overflo! 5for example rectangular or rundeMffnungen in the attic0 or emergency procedures 5ttica procedures or emergency procedures !ith pipe systems0 can %e used for emergency drainage* &mergency drainage pipe systems are siEed free mirror systems or systems operated as scheduled filled !ith pressure fluid* &mergency drainage must not %e connected to the drainage system, %ut must %e derived !ith free outflo! on harmless su%mersi%le land* The rain drainage system and emergency drainage system must share at least the century rain to %e expected at the %uilding a%out five minutes 5r (,1 (,10 can drain* n extraordinary level of protection for a %uilding is re+uired, should the emergency drainage systems alone the century rain 5r (,1 (,10 can safely derive*
The lo!er edge of the emergency drainage must %e a%ove the re+uired pressure level for the selected roof outlet* The necessary e+uations and diagrams for the design of emergency drainage systems are included in the ne! DIN 1986-1* Renovation of roofs
Bhec3ing or adHusting the hydraulic performance of the rain drainage systems on the current design rain donation 5r (*( (*( '0 If an emergency drainage exists, must the performance and positioning emergency de!atering chec3s and adHusts, if necessary, %e If there is no emergency drainage, must %e a complete redefinition of emergency de!atering re all existing components, !hich !ill continue to %e used to chec3 on their proper condition Roof gutters
The DIN 1986-1 no! contains a summary of planning and design principles for suspended gutters 5half round ? %ox-shaped0 and for internal gutters and gutter noEEle or gutter drains* s a shortcut for the user appropriate charts and ta%les are included in the standard* -ntrapment . and overload proof
Inside of buildings
The heights of the flood to %e expected on the roof must %e calculated and coordinated !ith the structural engineer for roof surfaces !ithout emergency drainage* =or ne! installations is in this case for the drainage system led to the inside to a relaxation point overload proof 5courtyard drain, manhole !ith an open flo! and manhole covers !ith vents etc*0 carry out, provided that the nominal siEe immediately gro!s %efore the point of relaxation as DN 1(* Aefore the renovation of roofs of hydraulischen2eistungsfhig3eit and overload proof to lead al!ays a revie! is to ma3e the drainage system* The flood - and overload proof are for the century rain 5r (,1 (,10 carry out* /utside of buildings
Drainage systems for the disposal of rain !ater from small plots can %e siEed normally !ithout flooding test* ;mall plots of land have an effective drainage area 5 O B0 up to 8 m#that is sufficient for a channel of connection of DN 1(* nderground pipes of land up to # ha, !hich drain more harmless su%mersi%le courtyard or par3ing areas or other grounds, can %e siEed according to the D< 118* 118* The annuality of calculation rain may not less than once in # years* &vidence of controlled the safety against flooding or are schadlosen%erflutung in accordance !ith DIN &N '(# perform* nd%erflutungsnach!eisen as !ell as for the rain %ac3 volume in the DIN 1986-1 contain all the necessary e+uations for performing overload* Balculation examples are located in the commentary to the ne! standard*
