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TECHNICAL DATA SHEET
POSTECH PILE P178 (1 7/8’’)
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
48 mm (1 7/8 in)
Blade size
From 200 and 255 mm (8 and 10 in)
Length
Standard of 2.1 m and 3 m (7’ and 10’)
Tubing thickness
3.7 mm (0.145)
Blade thickness
8 mm (5/16 in) for diameter of 8 and 10 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]
90 kN
Tube resistance moment
1.5 kN.m
Blade assembly
45 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)
9
11
125
150
175
200
250
≥300
73
88
102
117
145
≥175
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
20
16
13
11
10
8
6
5
3
34
28
23
20
17
14
11
9
6
C
29
24
20
17
15
12
10
7
5
T
Allowable
bearing
capacity of
soils (kPa)
100
125
150
175
200
250
300
≥ 350
6
8
10
11
13
16
20
≥25
Allowable lateral load (kN)
P178
0.7
0.8
0.9
1.0
Soil density
KN/m3
16
18
20
22
75
5
Lateral load
50
3
C=compressive T=tensile
Compaction
index N
30
24
19
16
13
12
10
7
6
4
22
18
14
11
10
9
7
5
4
3
T
36
29
23
19
16
14
11
9
7
4
T
26
31
36
42
47
52
57
63
68
1250
1500
1750
2000
2250
2500
2750
3000
3250
115
121
126
5750
6000
110
5250
5500
99
105
94
4500
5000
89
4250
4750
84
78
4000
3750
73
21
1000
3500
15
68
66
64
62
60
58
56
54
52
50
48
44
40
35
31
26
21
16
12
7
2
-
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)
Tensile
Allowable loads (kN)
Compressive
Cohesive soils (clay)
Cohesionless soils
(silt, sand or gravel)
750
Applied torque
(lb-foot)
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.
TECHNICAL NOTES
49
39
31
25
21
20
16
12
10
6
C
255 mm
Ø
200 mm Ø
C
Blade
Blade
Allowable load (KN)
Allowable loads in cohesionless soils (silt, sand or gravel)
21
17
14
12
7
5
75
100
58
4
T
255 mm
Ø
200 mm
Ø
C
Blade
Blade
44
50
30
C=compressive T=tensile
Undrained
shear
strength
(kPa)
Allowable load (kN)
Allowable loads in cohesive soils (clay)
TECHNICAL DATA SHEET
POSTECH PILE P178 (1 7/8’’)
www.postech-foundations.com