Compression Tests
 

Results :

The displacement of the jack head depending on the applied load is presented in the figures 2 to 17 . The tables 3 and 4 give the max. load for each test.

Table 3 : test results on screwjack pedestals ( centric load )


Reference
of the
Screwjack
Pedestal
Height of the
screwjack
pedestal
( mm )
 Number of 
sleeves
 Visible cumulated threaded height 
( mm )
Centric
load ( kN )
Centric
load ( kN )( lbf )
B43/50 (B2)
52
63
75
0
0
13
26
67.9
25.2
12.9
15259
5663
2899
B43/75 (B3)
75
97
120
0
0
24
45
57.4
28.2
9.7
12900
6337
21180
B43/120 (B4)
120
160
200
0
0
43
85
64.1
35.5
15.9
14405
7978
3573
B43/200 (B5)
190
230
270
1
5
48
79
33.2
20.8
11.6
7461
4674
2607
B43/240 (B6)
240
270
300
1
58
86
115
26.5
20.1
15.3
5955
4517
3438
B43/300 (B7)
300
350
400
2
48
106
150
35.8
19.4
13.2
8045
4360
2966
B43/500 (B10)
400
450
500
3
87
135
185
20.2
20.2
14.0
4360
3820
3506
B43/600 (B12)
500
550
600
4
125
169
214
19.4
17.0
15.6
4360
3820
3506
-----------------------------------------------------------------------------------
 

Table 4 : test results on screwjack pedestals ( eccentric load )
* : no registration for the graphic representation


Reference
of the
Screwjack
Pedestal
Height of the
screwjack
pedestal
( mm )
Number of 
sleeves
Visible cumulated threaded height 
( mm )
Eccentric
load ( kN )
Eccentric
load ( lbf )
B43/50 (B2)
52
63
75
0
0
15
25
25.4
6.3
4.4*
5708
1416
989
B43/75 (B3)
75
97
120
0
0
24
50
19.0
7.4
3.4
4270
1663
764
B43/120 (B4)
120
160
200
0
1
44
85
21.6
13.0
7.1
4854
2921
1596
B43/200 (B5)
190
230
270
1
6
49
83
11.6
7.2
2.7
2607
1618
607
B43/240 (B6)
240
270
300
1
57
88
117
13.6
8.5
4.9
3056
1910
1101
B43/300 (B7)
300
350
400
2
48
107
153
15.1
8.1
5.7
3393
1820
1281
B43/500 (B10)
400
450
500
3
87
137
183
8.0
8.0
5.8
1798
1798
1303
B43/600 (B12)
500
550
600
4
127

214
6.6
6.3
5.5
1483
1416
1236

 
 
SECURITY VALUE FOR ADMISSIBLE MAXIMUM LOAD

1 ) Security for human passage in contexts such as terraces
value to be divided by 2

2 ) Security for industrials raised floor platforms
value to be divided by 4

ex : centric load of P4 at 160 mm ( 3550 kg : 4 ) = 887,5 kg / pedestal

 




 
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