Other considerations for sloped roofs can be found throughout Chapter 7 of ASCE 7-10. ----- EN1991-1-3_(b).zip (Exc el 32-64 bit) Annex A - Normative - Design situations and load arrangements to be used for different locations. In the Loadcase dialog when a snow, snow drift, or ice loadcase is selected, the default values of Ψ 0, Ψ 1 and Ψ 2 are displayed. As an integral part of the National Annexes for the application of Eurocode 1, Parts 1-3, 1-4 and 1-5, it is necessary to develop snow load, wind and temperature maps, and for the application of Eurocode 8, part 1, the map of earthquake areas in Bosnia and Herzegovina. In the language of the Eurocodes, ‘dead loads’ become ‘permanent actions’, imposed loads, snow loads and wind loads are collectively called ‘variable actions’ and ‘load combinations’ becomes ‘combinations of actions’. In persistent or transient situations, snow load on a roof, s, is defined as being: Sk -where snow load shape factor p1 - undrifted snow shape factor p2 - drifted snow shape factor. The flat roof snow load is calculated using formula 7.3-1: General actions. Actions on structures. 1-3: Snow loads 1-4: Wind actions 1-5: Thermal actions 1-6: Actions during execution 1-7: Accidental actions This guide is essential reading for: civil and structural engineers code-drafting committees clients structural-design students public authorities product manufacturers in fact, everyone who will be affected by the Eurocodes. After defining general structure parameters necessary to generate snow/wind loads (envelope, spacing, and depth) for the snow/wind code - Eurocode 1 (EN 1991-1-3:2003 - wind and EN 1991-1-4:2005 - snow and several codes for individual European countries), you must also specify the parameters for the snow and wind loads.. These vary depending on the National Annex being worked to. Snow loads Name of Standards Organization: British Standards Institution (BSI) LEGALLY BINDING DOCUMENT With this Eurocode being focused on an action that is sensitive to environmental effects, the UK annex to it plays a significant role, as it makes reference to projected snow falls that are unique to the British Isles. The snow load that is applied to our structure is not the ground snow load, but in most cases, the flat roof snow load. David Brown, SCI Deputy Director, explains the Eurocode system. 6.4 Snow loads on snowguards and other obstacles. Source: Designers' Guide to Eurocode 1: Actions on Buildings, 1 Jan 2009 (19–27) Chapter 4 Snow load on the ground Source: Designers' Guide to Eurocode 1: Actions on Buildings … Snow and snow drift loads (Eurocode) Definition of psi factors for snow and snow drift load cases. Annex B - Normative - Snow load shape coefficients for exceptional snow drift. Sec. 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