Accessories
Pile shoes
The tip of a pile is protected by a bottom plate. The bottom plates are attached to the shaft-grouted RR pile through friction.
Splices
The shaft-grouted RR micropiles utilise friction-based splices that meet the requirements set for rigid splices in the Finnish national appendix to EN 1993-5. The splice is an external double conical sleeve splice. No welding of the splice is needed on site.
Minimum requirements for strength and stiffness properties of splice
| Pile type |
Tensile strength (kN) |
Compressive strength |
Yield moment M |
Bending stiffness EI (0.3-0.8 M) |
| RR75 |
74 |
Ppile |
Mpile |
0.75xEIpile |
| RR90 |
87 |
| RR115/6.3 |
114 |
| RR115/8 |
176 |
| RR140/8 |
218 |
| RR140/10 |
269 |
| RR170/10 |
328 |
Bearing plates
A bearing plate is usually installed at the top of a shaft-grouted RR pile to transfer loads on the upper structures to the pile.
The dimensions of standard bearing plates
| Pile |
Dimensions (mm x mm x mm) |
| RR75 and RR90 |
150 x 150 x 15 |
| RR115/6.3 |
200 x 200 x 20 |
| RR115/8 |
250 x 250 x 25 |
| RR140/8 and RR140/10 |
250 x 250 x 25 |
| RR170/10 and RR170/12.5 |
300 x 300 x 30 |
Properties
The steel grade of shaft grouted RR piles is S440J2H.
Chemical composition, max
| Steel Grade |
C (%) |
Mn (%) |
P (%) |
S (%) |
CEV(%) |
| S440J2H |
0.16 |
1.60 |
0.020 |
0.018 |
0.39 |
Mechanical properties
| Steel grade |
fy min(MPa) |
fu (MPa) |
A5 min (%) |
T (°C) |
KV min (J) |
| S440J2H |
440 |
490-630 |
17 |
-40*) |
27 |
*)Impact strength requirement must be agreed separately with material thicknesses over 10 mm.
Design tools
Steel pipe piles are dimensioned in accordance with valid European (CEN) norms and standards and/or national regulations and guidelines. The extensive size range and steel grade alternatives of Ruukki steel pipe piles support economical foundation design.
Design software and objects
To make both architectural and structural design work easier with accurate product information in 3D form, Ruukki offers a selection of free CAD / BIM-objects and tool sets developed as add-ons for professional designing software such as ArchiCAD and Tekla Structures to be downloaded from the Software Toolbox.
Download Ruukki pile component package for Tekla Structures 15.0 / 16.0 / 16.1
Order and delivery
The RR pile pipes are delivered equipped with load labels that indicate:
- Manufacturer
- Dimension data
- Steel grade
If these markings are not present, the pile pipe must not be used in RR piles.
The pile shoes, bearing plates and internal splices are delivered as separate parts in a package, which is equipped with type approval tape. The technical delivery terms for piles conform to the standard EN 10219-1, and the dimensions and tolerances conform to EN 10219-2.