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TECHNICAL DATA SHEET
POSTECH PILE P312 (3 1/2’’)
NORMATIVE INFORMATION
Postech products are approved by the Canadian Construction Materials Centre (CCMC 13102-R). They were tested on site by an engineering firm
recognized by the CCMC. The technical evaluation indicates that Postech products respect the requirements of the CCMC guidelines for augered steel
piles. Their performance is equivalent or superior to prescribed NBC 2010 standards.
PRODUCT CHARACTERISTICS
Physical and Chemical properties
Steel grade
Conform to CAN/CSA G40.21-350W and/or
ASTM-A500 class C
Arc Welding
Conform to CSA W59-M1989
Hot dip galvanisation
Conform to ASTM-A123M
Thermal insulation
Unique polyurethane foam
Standard characteristics
Tubing size
89 mm (3 1/2 in)
Blade size
From 255 to 455 mm (10 to 18 in)
Length
Standard of 2.1 m and 3 m (7’ and 10’)
Tubing thickness
5.5 mm (0.216)
Blade thickness
9,5 mm (3/8 in) for diameters from 10 to 14 in
12,7 mm (1/2 in) for diameters from 16 to 18 in
Adapter heads
Various forms as needed according to the project
specifications
Extensions
Available according to project specifications
Allowable mechanical resistance
Maximum compressive and tensile [ELS]
270 kN
Tube resistance moment
7,9 kN.m
Blade assembly
80 kN
DESIGN INFORMATION
Thermal insulation
Postech products are insulated by a process of injecting polyurethane foam in the pile's shaft. The
revolutionary insulation system ensures that the inside of the pile is maintained at a temerature that will
prevent ice or frost build-up at the base of the pile; providing optimal protection against ground motion
using our planet's heat.
Screw pile advantages
Product and installation is supplied, you only need to mark the spot
No waiting time, you can build as soon as the installation is ready
The most reliable & economical solution available
Can be installed in all climates, weather or ground conditions
No excavation usually required, minimal impact to your property
Can be installed under an existing structure
Reusable and recyclable, environmentally friendly
Bearing capacity
Postech products are designed to bear compressive and tension loads through the blade located at the
bottom of the shaft. The design of the shaft and the size of the blade depend on the load and on the
bearing capacity of the soil. The monitoring of the applied torque on site allows for the confirmation of
the bearing capacity of the soil. (See tables on the reverse page.)
MANUFACTURER:
Pieux Vistech - Postech Screw Piles
525, Parc-Industriel Street, Sherbrooke QC J1C 0J2
Phone: 819.846.4004 1.866.277.4389 Fax: 819.846.0793
www.postech-foundations.com
Allowable
bearing
capacity of
soils (kPa)
MANUFACTURER:
Pieux Vistech - Postech Screw Piles
525, Parc-Industriel Street, Sherbrooke QC J1C 0J2
Phone: 819.846.4004 1.866.277.4389 Fax: 819.846.0793
250
≥300
145
≥175
34
28
23
20
11
30
25
20
18
15
13
10
8
5
47
39
32
28
24
20
16
12
8
C
40
33
27
23
20
17
13
10
7
T
66
55
44
39
33
28
22
17
11
C
54
45
36
31
27
22
18
14
9
T
355 mm Ø
Blade
86
71
58
50
43
36
29
22
15
C
68
57
46
40
34
29
23
17
12
T
405 mm Ø
Blade
109
90
73
63
55
45
36
27
19
C
87
72
58
51
44
36
29
22
15
T
455 mm Ø
Blade
36
29
68
54
43
35
30
27
22
16
14
8
C
4.5
5.0
5.6
6.2
18
20
22
Allowable lateral load
P312
49
23
19
16
14
11
9
7
4
16
KN/m3
Soil density
39
300
≥ 350
20
≥25
Lateral load
31
25
250
21
20
200
150
10
16
16
125
8
12
13
100
6
10
175
75
5
6
T
(kN)
50
40
32
26
22
20
16
12
10
6
T
300 mm Ø
255 mm Ø
C
Blade
95
76
60
49
42
38
30
23
19
11
C
123
98
79
64
54
49
39
30
25
15
90
72
58
47
40
36
29
22
18
11
T
155
124
99
81
68
62
50
37
31
19
C
36
42
47
52
57
63
68
73
1750
2000
2250
2500
2750
3000
3250
3500
115
121
126
5750
6000
110
5250
5500
99
105
5000
94
4500
4750
89
4250
84
31
1500
78
26
1250
4000
21
1000
3750
15
Compressive
68
66
64
62
60
58
56
54
52
50
48
44
40
35
31
26
21
16
12
7
2
-
Tensile
Allowable loads (kN)
Cohesionless soils
(silt, sand or gravel)
750
Applied torque
(lb-foot)
42
39
37
34
31
28
25
22
19
17
14
11
8
5
Compressive
34
32
29
27
24
21
19
16
14
11
8
6
5
4
Tensile
Allowable loads (kN)
Cohesive soils (clay)
Applied torque versus the allowable loads
in compressive and tensile
- For cohesionless soils, the safety factor varies from 2.0 to 3.0 in compressive loads and from 2.0 to 2.4 in tensile loads.
- For cohesive soils, the safety factor varies from 2.0 à 2.9 in compressive and in tensile loads.
- The safety factor for the lateral loads varies from 2.0 to 6.4, for cohesionless and cohesive soils.
- If there are any boulders (> 200 mm in diameter) in the granular matrix, the above mentioned capacities will be overstated.
In this case, the allowable loads will have to be established on the site using a confirmatory test
114
91
73
59
50
46
36
27
23
14
T
455 mm Ø
405 mm
Ø
C
Blade
Blade
TECHNICAL NOTES
69
55
44
36
30
28
22
17
14
8
T
355 mm Ø
Blade
Allowable load (kN)
Blade
11
50
3
C=compressive T=tensile
Compaction
index N
Allowable
bearing
capacity of
soils (kPa)
Allowable loads in cohesionless soils (silt, sand or gravel)
200
117
17
150
175
88
125
73
102
14
100
58
9
75
44
6
50
T
300 mm Ø
255 mm Ø
C
Blade
Blade
30
C=compressive T=tensile
Undrained
shear
strength
(kPa)
Allowable load (kN)
Allowable loads in cohesive soils (clay)
TECHNICAL DATA SHEET
POSTECH PILE P312 (3 1/2’’)
www.postech-foundations.com