Glass Panel.xls

GLASS CALCULATION I.

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

138 )

glass

Mpa ok

21.0

mm ok