10A. DIMENSIONING PART 1/4

EXAMPLE Suppose you have set all the parameters for the Wooden Lodges layer and you want to pass them to the Wooden Beams layer. Select the Wooden Lumber layer, press the "Copy" button and select the Wooden Beams layer and press the "Paste" button which is already activated. Now all the parameters of the Wooden Lumber Yards layer have been passed to the Wooden Beams layer. The parameters that the designer is asked to define are then explained in detail on a case-by- case basis: Safety factors gM The values of the safety factors γM for materials shall be used for cases of normal or accidental loading (accidental loading does not include the case of earthquake, to which paragraph 2.9.4 of this document applies). Fundamental combinations of actions cM Natural timber (Solid ) 1.3 Members Glued laminated timber (Glulam) 1.25 Indicative values (EC5 - Table 2.3) are presented in the table below: Class of operation of structures - influence of moisture content percentage (MoC) Humidity is related the environmental conditions in which the structure (or member) operates, i.e. temperature and relative humidity. The Regulation defines three categories of operation (EC5 - 2.3.1.3): Category of operation Temperature and relative humidity environment P.P.Y. Examples 1 Temperature 20 o C The relative humidity exceeds 65% only for a few weeks a year (9±3) % Closed structures that heated (hot roofs, floors and interior walls) 2 Temperature 20 o C The relative humidity exceeds 85% only for a few weeks a year (12±3) % Enclosed structures not heated or periodically heated (e.g. holiday homes) (15±3) % Open roofed constructions, cold roofs, external walls and more generally structures that are not directly exposed to the weather phenomena 3 Climate conditions leading to a rate of moisture content > 19 % Structures in damp places or structures exposed to