C. COLD FORMED CROSS-SECTIONS

CHAPTER C: 'COLD ROLLING CROSS-SECTIONS' 4 3. GEOMETRIC PROPORTIONS The provisions for design based EC3-1-3 calculations apply only to section width - thickness ratios b/t, h/t, c/t and d/t within the limits of the following Table. The limits for the reasons given are considered to represent the field for which there is sufficient experience and verification by experimental results. Cross-sections with larger width-to-thickness ratios may also be used, provided that their strength at failure limit state and their behaviour in the serviceability limit state are verified by experiments and/or calculations, confirmed by an appropriate number of experiments. The dimensions of the reinforcements shall be within the following limits so as provide adequate stiffness and to avoid buckling of the reinforcement itself. 0.2≤ c / b≤ 0.6 0.1≤ d / b≤ 0.3 If c / b< 0,2 or d / b< 0,1 the edge is ignored and set c= 0 or d= 0. NOTE: According to EC3-1-3 the length of the rim c is measured perpendicular to the tread in the case where the rim is not perpendicular to the tread. However, in SCADA PRO the angled length is taken into account, not the projection Cross-section data Maximum price b / t ≤ 50 b / t ≤ 60 c / t ≤ 50 b / t ≤ 90 c / t ≤ 60 d / t ≤ 50 b / t ≤ 500 45 °≤ f ≤ 90 ° h / t ≤ 500 sinφ