General To design adequate glass of a spider pin supported curtain wall meeting required criteria. All units is in metric system.
II.
Design Calculation 1
Design Code BS 8118 Part 1:1991:Structural Use of Aluminium. Code of Practice for design ASCE 7-05 Min. Design Loads for Buildings and other Structures
2
Material used 16 mm thick glass
3
(8+1.5+8)
Allowable stress, heat strengthened Glass
:
33.00
N/mm2
Allowable stress, tempered glass
:
49.00
N/mm2
Allowable stress, structural sealant
:
138.00
N/mm2
Modulus of Elasticity, E
:
72000.00
N/mm2
:
0.4238
kN/m2
: : : : :
45.00 75.00 75.00 122.00 9.10
m/s m m m m
:
1.250
kN/m2
Loading Dead Load (DL) Wind Load
4
Load Combination
5
Wind Load calculation
Glass weight Basic Wind Speed, v Length of Building, L Width of Building, W Height of Bldg., H Top of spider wall
3-sec gust
1.0 Dead Load (for service ability check) 1.0 Wind Load (for service ability check) 1.2 Dead Load ± Wind Load
Refer to wind calculation for full details. Max. Wind Pressure 6
Analysis of Glass Panel 8 mm thk glass 1.5 binder 8 mm thk glass Maximum aspect size on glass panel Height = Width =
3522 1262
mm mm
Horizontal loading act on glass panel wl = 1.25 kpa Note: Assume the glass panel simply supported in 4 sides
glass
Check the bending stress of glass panel Bending moment due to horizontal loading M = q*L^2 / 8 Note: (consider 1000mm width) q= 1.25 x 1= 1.25 L= 1262 mm M= 1.25 x 1262 ^2 / 8 = Bending stress due to wind loading δ = M*6/(t^2*B) = 5.83 Note: B= 1000 mm t= 16 mm (8+1.5+8) Check the deflection of glass panel Deflection due to horizontal loading Note: (consider 1000mm width) q= 1.25 x L= 1262 mm ExI= 2.4576E+10 deflection = 1.68 mm
N/mm 248,851 Nmm
Mpa <
49
1=
1.25
N/mm
<
1262
/
60 =
Analysis of structural sealant of glass panel Area of glass panel = 4.4 m2 design wind speed = 1.25 kpa required width of structural sealant B= 1262 x 1.25 / ( = 11.4 mm
