Accessories
Bearing plates
A bearing plate is usually installed at the top of an RR pile to transfer loads on the upper structures to the pile.
The capacities and dimensions of standard bearing plates
Pile |
Bearing plate dimension (mm x mm x mm) |
Suggested pile loads (kN) |
| RR90 |
150 x 150 x 15 |
350 |
| RR115/6.3 |
200 x 200 x 20 |
600 |
| RR115/8 |
250 x 250 x 25 |
700 |
| RR140/8 and RR140/10 |
250 x 250 x 25 |
950 |
| RR170/10 and RR170/12.5 |
300 x 300 x 30 |
1400 |
| RR220/10 |
300 x 300 x 30 |
1620 |
| RR220/12.5 |
300 x 300 x 30 |
1620 |
| RR270/10 |
350 x 350 x 30 * |
2100 |
| RR270/12.5 |
350 x 350 x 30 * |
2100 |
| RR320/10 |
400 x 400 x 30 * |
2700 |
| RR320/12.5 |
400 x 400 x 30 * |
2700 |
*) Not in stock
Pile shoes
The tip of a pile is protected either by a bottom plate or a rock shoe. The most common type is the bottom plate. The pile shoes are attached to the pile through friction. The rock shoe dowel is made of hardened special steel to ensure good penetration of the rock.
Properties
The steel grade of RR piles are S440J2H or S550J2H.
Chemical composition, max
| Steel Grade | C (%) | Mn (%) | P (%) | S (%) | CEV(%) |
|---|
| S440J2H |
0.16 |
1.60 |
0.020 |
0.018 |
0.39 |
| S550J2H |
0.12 |
1.90 |
0.020 |
0.015 |
0.43 |
Content of Mn can be increased when C content is decreased.
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.
Piles may be dimensioned either as steel structures or, in the case of concrete-filled piles, as steel-concrete composite structures. Corrosion of steel piles is generally taken into account by subtracting the corrosion allowance corresponding to the design life of a structure from the wall thickness of the cross-section.
Static bearing-capacity formulas or methods based on sounding resistance can be used in the geotechnical dimensioning of piles. The geotechnical capacity of a pile is the sum of tip and shaft resistance. The load-bearing capacity of driven RR piles is usually based on tip resistance. The geotechnical capacity of driven piles can be determined during installation by dynamic piling formulas or advance piling simulations based on the stress wave theory.
The geotechnical capacity of piles and validity of the end driving criteria can be ensured by dynamic or static test loadings. The selection of pile installation equipment and installability are key issues in pile design. In the selection of equipment for driven piles, it must be ascertained that the equipment is able to install the piles to the depth required to attain the necessary geotechnical capacity.
The selected equipment must also be efficient enough to mobilise the required bearing capacity in dynamic test loading. Alternatively, a separate test hammer can be used. It must be ensured that the equipment used does not damage the piles during installation.
Download RR piling manual
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.