SIST EN 1991-1-3:2004/A1:2015

SLOVENSKI STANDARD
01-november-2015
Evrokod 1: Vplivi na konstrukcije - 1-3. del: Splošni vplivi - Obtežba snega
Eurocode 1 - Actions on structures - Part 1-3: General actions - Snow loads
Eurocode 1 - Einwirkungen auf Tragwerke - Teil 1-3: Allgemeine Einwirkungen,
Schneelasten
Eurocode 1 - Actions sur les structures - Partie 1-3: Actions générales - Charges de
neige
Ta slovenski standard je istoveten z: EN 1991-1-3:2003/A1:2015
ICS:
91.010.30 7HKQLþQLYLGLNL Technical aspects
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1991-1-3:2003/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2015
EUROPÄISCHE NORM
ICS 91.010.30
English Version
Eurocode 1 - Actions on structures - Part 1-3: General
actions - Snow loads
Eurocode 1 - Actions sur les structures - Partie 1-3 : Eurocode 1 - Einwirkungen auf Tragwerke - Teil 1-3:
Actions générales - Charges de neige Allgemeine Einwirkungen, Schneelasten
This amendment A1 modifies the European Standard EN 1991-1-3:2003; it was approved by CEN on 17 July 2015.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1991-1-3:2003/A1:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Modifications to the Foreword . 4
2 Modification to 1.2, Normative references . 4
3 Modifications to 3.3. Exceptional conditions . 4
4 Modifications to 4.3. Treatment of exceptional snow loads on the ground . 5
5 Modifications to 5.2 Load arrangements . 5
6 Modifications to 5.3.1, General . 6
7 Modifications to 5.3.2, Monopitch roofs . 7
8 Modifications to 5.3.3, Pitched roofs . 8
9 Modifications to 5.3.4, Multi-span roofs . 9
10 Modifications to 5.3.5, Cylindrical roofs . 11
11 Modifications to 5.3.6, Roof abutting and close to taller construction works . 13
12 Modification to 6.2 Drifting at projections and obstructions . 13
13 Modification to Annex B (normative), Snow load shape coefficients for exceptional snow
drifts. 13
14 Modifications to Annex C (informative), European Ground Snow Load Maps . 13

European foreword
This document (EN 1991-1-3:2003/A1:2015) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2016, and conflicting national standards
shall be withdrawn at the latest by September 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Modifications to the Foreword
th
Replace the 5 paragraph:
"Annexes A and B are normative. Annexes C, D and E are informative."
with the following one:
"Annex A is normative. Annexes B, C, D and E are informative.".
rd
In the final part "National Annex for EN 1991-1-3", in the final list, in the 3 line of the numbering of
subclauses, just after "3.3(1)," add "3.3(2),".
th
In the final part "National Annex for EN 1991-1-3", in the final list, in the 5 line of the numbering of
subclauses, just after "5.2(8)" add "5.3.1(1), Note to Table 5.2, 5.3.2(2)".
th
In the final part "National Annex for EN 1991-1-3", in the final list, in the 5 line of the numbering of
subclauses, after "5.3.4(3),", add "5.3.4(4),".
2 Modification to 1.2, Normative references
Delete the NOTE and the following reference:
"
NOTE: The following European Standards, which are published or in preparation, are cited in normative clauses
EN 1991-2 Eurocode 1: Actions on structures
Part 2: Traffic loads on bridges".
3 Modifications to 3.3, Exceptional conditions
Paragraph 3.3(2), replace:
"…….
b) the accidental design situation should be used for snow load cases determined using 5.2(3)P c)
and Annex B.
NOTE: See Annex A case B2."
with:
"…….
b) the accidental design situation should be used for snow load cases determined using 5.2(3)P c)
and appropriate load arrangements and snow load shape coefficients for exceptional snow drifts.
NOTE 1: See Annex A case B2.
NOTE 2: The National Annex may specify the load arrangements to be used for exceptional snow drifts, also
making reference to the informative Annex B, where its use is allowed (see also 5.3 and 6.2).".
Paragraph 3.3(3), replace:
"c) the accidental design situation should be used for the snow load cases determined using 5.2(3)P c)
and Annex B."
with
"
c) the accidental design situation should be used for the snow load cases determined using 5.2(3)P c)
and appropriate load arrangements and snow load shape coefficients for exceptional snow drifts.".
At the end of paragraph 3.3(3), add:
"NOTE 3: The National Annex may specify the load arrangements to be used for exceptional snow drifts, also
making reference to the informative Annex B, where its use is allowed (see also 5.3 and 6.2).".
4 Modifications to 4.3, Treatment of exceptional snow loads on the ground
Note to paragraph 4.3(1), replace:
"NOTE: The coefficient C may be set by the National Annex. The recommended value for C is 2,0 (see also
esl esl
2(3))"
with:
"NOTE: The coefficient C and locations of its application may be set by the National Annex. The recommended
esl
value for C is 2,0 (see also 2(3))".
esl
5 Modifications to 5.2 Load arrangements
Paragraph 5.2(2), replace:
"(2) The load arrangements should be determined using 5.3; and Annex B, where specified in
accordance with 3.3.
NOTE: The National Annex may specify the use of Annex B for the roof shapes described in 5.3.4, 5.3.6 and 6.2, and
will nor
...