• Author / Uploaded
• Mohammed Faizal Nv

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• Ingeniería mecánica
• Naturaleza

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Owner Client DESIGN FOR THE ANCHOR CHAIR

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Rev no Date Qty

(CHAIR DESIGN AS PER AISI E-1, VOLUME II, PART VII) Anchor Bolt Design Load , Provided Distance From Outside Of Top Plate To Edge Of Hole, Ditance Between Vertical Palates, Anchor Bold Diameter, Anchor Bolt Eccentricity, Top Plate Width Along The Shell, Anchor Chair Height, Radius Of Shell To The Centre Line Of Shell Plate, Corroded Bottom Plate Thk, Top Plate Thickness Radius Of Shell Bottom Shell Course Thickness (Corroded) Top plate length Anchor bolt diameter Vertical plate width ( Average ) Vertical plate thickness TOP PLATE DESIGN Critical stress in top plate , S

= = = = = = = = =

P f g d e a h R m c w t b d k j =

= = = = = = =

P / (f x c2 x ((0.375 x g) - (0.22 x d))) HENCE

Bending plus direct stress in shell, Sb

Where

=

Reduction Factor

=

187.020000 98.5 100 33 108.5 150 275 5500 6.5 21.7 5500 16.5 225 33 153 14

=

27.1 3.88 3.94 1.30 4.27 5.91 10.83 216.54 0.26 0.85 216.54 0.65 8.86 1.30 6.02 0.55

Mpa mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm

78.67 Mpa

S < 172 Mpa

Ksi inch inch inch inch inch inch inch inch inch inch inch inch inch inch inch

11.41 ksi

SAFE

P*e / t2* (1.32*Z / (1.43*a*h2 / ( R* t ) + ( 4*a*h2 )0.333 ) + 0.031 / ( R*t )0.5) = 123.29 Mpa HENCE Sb < 172 Mpa SAFE 1/((0.177*a*m/(R*t)0.5)*(m/t)2+1) =

17.88 ksi 0.997

VERTICAL SIDE PLATE Minimum thickness is greater of 0.5 inch or 0.04 (h-c)

Minimum thickness j k 3.32 HENCE

= 0.5 = 0.5 = 0.5 = 12.7 ≥ P / 25 > 1.08 J k > P / 25 SAFE

or or

0.04 ( h - c ) 0.40 inch mm

f

e

g

a

j b

Radius

h

k

RF Pad

Q

PCD

WELD SIZE CALCULATION Wv WH

= =

W

=

P / (a + 2h) P e / ( ah + 0.667 h2 ) (Wv 2 + WH 2 )0.5 HENCE W

8.81

= =

6.8 5.6

Mpa Mpa

0.98 0.82

Ksi Ksi

=

8.8

Mpa

1.28

Ksi