ENGINEERSAMPLEPROJECTINLONDON ROJECTDOCUMENT NO.CALC-702 REVISIONPages 0GLASSCHECK TITLE 85
TableofContents
1 References... 31.1 Document references. 31.3 1.2 Structural analysis software. Loads 31.4 Design Approach . 4 51.5 Glass list. 62 Glass @ Acoustic Zone 1..2.1 GL-01 (Vision).2.2 GL-02 GL-04 & GL-05 (Vision/Vent). 223 Glass @ Acoustic Zone 2. 373.1 4 Glass @ Acoustic Zone 3.. GL-11 & GL-12 (Vision/Vent) . 52 374.1 GL-21 & GL-22 (Vision/Vent) .. 524.2 GL-63b & GL-83b (Vision: 3-side supported) 675 Annex. 825.1 PVB Interlayer Shear modulus. 825.2 Acoustic PVB Interlayer- Shear modulus. 835.3 IGU Edge seal -Technical data sheat 84
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1 References
1.1 Document references
1.1.1 Norms and standards
[1] IStructE. Structural use of glass in buildings. 2nd edition February 2014.[2] isp jo sis je 1 ue sued sse go uis q u ss 09 d[3] [4] pr EN 13474-1:1999. Glass in building - Design of glass panes Part 1: General basis of design. BS 6180:2011. Barriers in and about buildings Code of practice.[5] CWCT TU14 Technical update on Load binations
1.1.2 Project specific documents
[9] D701-21-CPT-CALC-001 Loads and load binations.[7] D701-21-CPT-CALC-002 System framing profiles Window types A& H.[8] Performanceecificationfrthenstallationf:CurtainWalWindowsSlidingDoorsSlopedGlazing D701-21-CPT-CALC-003 System framing profiles Window types E L & Q.[6] Louvres Balustrades and Cladding Systems Fifth Issue. 26 July 2013.
1.2 Structuralanalysis software
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1.3 Loads
1.3.1 Dead load including selfweights (D)
Glass selfweight is generated by the software.
In accordance with load report [6]
1.3.3 Imposed/live load (L)
i.Residential areas:
Line load q Point load Qax = 0.74kN/m - applied at a height of 1.1m above FFLInfill lond wax = 0.5 -applied withi the irfll heigh of 1.m above FFL - applied within a.height of 1.1m above FFL= 1.0 kN/m
il. Retail and general assembly areas:
Line load qo = 1.5 kN/n -applied at a height of 1.1m aboye FFLPoint load Q = 1.5 appliediinheighf.maboveFFLInfil load wn.x = 1.5 kN/² applied witirn the infil heigtofT.Im above FFL
1.3.4 Maintenance load
Manual maintainance on walls according to CWCT clause 2.3.3:
E 0.5 KN applied on square of 100om sides
Point load Q
buffer system such that the equivalent static load applied to the glass in not more than 0.5 kN. Impact underaccidental situations giving equivalent static load more than 0.5 kN is not covered by this structural report.
1.3.5 Climatic load (C)
accordance with.prEN 13474-1 Climatic loads as a result of femperature atmospheric pressure and altitude difference is checked in
i.Glass production (Arino Duglass. Zaragoza)
=216.0 - above sea level
il.Site (London)
Highest altitude of glass installation
Internal actions of insulating glass unitsSummer Temperature difference △T [°C] 27Pressure difference △pme[kN/m] -3.0Altitude difference △H [m] = 216 - 0 216Winter Temperature difference △T [°C] - 27Pressure difference △pmet [kN/m?] 6.0Altitude difference △H [m] = 0 - 140 -140
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1.4 Design Approach
IStructE's Structural use of glass in buildings 2d edition and the draft European standard for determination ofthe load resistance of glass panes prEN 16612 are used as guidance for the following glass structural calculations.
Design criterion: o ≤ Jed
1.4.1 Glass design stress (αa)
FEM analysis of glass panes gives principal stresses to be factored by the partial factors below.
i.Partial factors
Varioble action 70 = 1.2 - for glass used as infills for fagade / eurtuin wallVariable action 70 Variable action 70 = 1.3 - for secondory structures including infills serving as barrierClimatic action y% = 1.5 - acpanying variable load to leadling wind.or imposed load -for primary structures= 1.0
1.4.2 Glass design strength (f.a)
i.Annealed glass
il.Prestressed surface glass
Design bending strength.fea=kkfek(fafexChoracteristic bending strength f seetablebelowStrengthening factor k 0.6 used either for horizontal or vertical tougheningMaterial portial factorgu 7.2 presfressed surface
Allowablestressforverticalglazinginfillpanel
Design Strength [N/mm²]Float Glass Types Bending strength Wind load* Imposed load only bs] 0 =pouy Kmod = 0.89Annealedmonolithic 45 (W) fg d 20.8 (L)fgd 25.0Heat-strengthened 70 37.5Thermally toughened 120 58.3 62.5Enamelled heat-strengthened 45 20.8 25.0Enamelled thermally toughened 75 35.8 40.0
Thermal stress calculation is not in the scope of this calculation.
