Stay Block Calculations
1
STAY BLOCK CALCULATIONS According to HFY/F&C0592-0616 Nominal breaking load (NBL )/conductor = 25.7 KN. Total group (NBL ) = 0.8 × 4 × 25.7 = 82.24 KN Max. tension case @ point A : intersection angle = 82º 3′ 27″ R=2 × 82.24 × cos (82º 3′ 27″/2 ) = 119.675 ≈ 120 KN Allowable tension = ( 120 / 2.5 ) = 48 KN 82.24 Rw = R sin10 87 3 27 R= 48/ sin10 = 276.42 KN R 82.24 Rup = R × sin 80 = 48 KN Counter weight required = 48 × 1000 / 9.81 = 4892 Kg Using 1 Cu.m. concrete block : 2500 kg. Depth = 1.5 m compacted sub-base Sub-base weight = 1.5 × 1600 = 2400 Kg 10º Total weight = 2500 + 2400 = 4900 < 4892 ok 9.0 m 1.5 m 1.5 m compacted sub-base 1.0 cubic meter concrete block 90º 92º 56′ 90 º 87º 3′ 27″ C C B A
-
Upload
ashraf-abdulredha -
Category
Documents
-
view
213 -
download
1
description
stay block clculations
Transcript of Stay Block Calculations
STAY BLOCK CALCULATIONS
According to HFY/F&C0592-0616
Nominal breaking load (NBL )/conductor = 25.7 KN.
Total group (NBL ) = 0.8 × 4 × 25.7 = 82.24 KN
Max. tension case @ point A : intersection angle = 82º 3′ 27″
R=2 × 82.24 × cos (82º 3′ 27″/2 )
= 119.675 ≈ 120 KN
Allowable tension = ( 120 / 2.5 ) = 48 KN 82.24
Rw = R sin10 87 3 27
R= 48/ sin10 = 276.42 KN R 82.24
Rup = R × sin 80 = 48 KN
Counter weight required = 48 × 1000 / 9.81 = 4892 Kg
Using 1 Cu.m. concrete block : 2500 kg.
Depth = 1.5 m compacted sub-base
Sub-base weight = 1.5 × 1600 = 2400 Kg
10º
Total weight = 2500 + 2400 = 4900 < 4892 ok 9.0 m
1.5 m
1.5 m compacted sub-base
1.0 cubic meter concrete block
90º 92º 56′
90 º 87º 3′ 27″
C C
B A
