Project Name Structural Calculation for Feature Pressing

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1 Project Name Structural Calculation for Feature Pressing Presented to: Client Logo Revision Generated by Date Reviewed by Date Comment

2 Table of Contents 1.0 Introduction & Loadings Introduction / METHOD OF ANALYSIS Loadings Structural Materials Aluminium Structural Calculation Feature Pressing - Assessment Overview Summary Table Feature Pressing FE Analysis... 5 Page 2

3 1.0 Introduction & Loadings 1.1 Introduction / METHOD OF ANALYSIS The following structural analysis of a Pressing as per provided drawings is carried out manually and with licensed STAAD PRO FEA software using linear analysis. The software results have been checked by hand calculation for accuracy and safety. 1.2 Loadings Dead Load: The dead load supported by the assessed components is not relevant for the component design. Wind Load: The design wind load for the capping here is kn/m 2 obtained from provided information. Snow Load: Conservatively a snow Load of 1.0kN/m 2 has been considered here. 2.0 Structural Materials 2.1 Aluminium Aluminium 6063 T6 Bending and overall yielding (po) 85N/mm 2 Local tension/compression (pa) 105N/mm 2 Aluminium 1050 H14 Bending and overall yielding (po) 160N/mm 2 Local tension/compression (pa) 175N/mm 2 Aluminium properties Density: 2710kg/m 3 Young s Modulus: 70kN/mm² Co-efficient of linear thermal expansion: 23 x 10-6 per o C Page 3

4 4.0 Structural Calculation 4.3 Feature Pressing - Assessment 3.0 Overview 3.2 Summary Table Component 1: Thickness /Material Pressing 3mm thick / Aluminium 1050 H14 Fixings: Fixing Component 1 to component 2 Dia /Material / centres 5.5mm Dia / Stainless 400 Centres No & Fixings Ref 1No - SFS intec SX5/12 5.5x35 min16mm dia EPDM washer (S16) Page 4

5 4.1.1 Feature Pressing FE Analysis Structural Model The Pressing is modelled as folded shell element with a geometry as per drawing in 2.0mm thick Aluminium 1050 H4. The fixing to the brackets is via 5.5mm self-tapping stainless steel 400mm centres Max Long Term Loading There is a self-weight and snow load as area load of 1.0kN/m2 assigned to the sloped top of the coping as shown. Max Short Term Loading The max short term Loading is the combination of factored wind load, imposed load and self-weight assigned as shown on the left Page 5

6 Max Max Load The max deflection under wind is 5.6mm Max Stress in Long term Loading The max stress under ULS is: 18.4N/mm 2 < 77.3N/mm 2 (ULS) So OK Max Stress in short Term Loading The max stress under ULS is: 66.6N/mm 2 < 77.3N/mm 2 (ULS) so OK. Page 6

7 Max Fixings The worst case load combination on the fixings are: (1.5DL+1.35LL+1.05LL) Max tensile force: Z= N Ed = 1287N Max vertical shear force: Y = V v.ed = 85N Max horizontal Shear force: X = V h.ed = 123N Equivalent shear force = (N v.ed 2 +V h.ed 2 )=150N Tensile Capacity: N Rd =1970N/1.25 = 1576N Shear Capacity: V Rd = 2350N/1.25 = 1880N Tensile Ratio: N Ed /N Rd = 1287N/1576N = 0.82 Shear Ratio: V Ed /V Rd = 150N /1880N = 0.08 combined: ( N Ed / N Rd ) 2 + (V Ed / V Rd ) 2 = 0.67 <1 Therefore OK Page 7

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