Pommier A5441 Mode D'emploi page 32

5e. MOUNTING 5: UNDRILLED HIGH OR LOW PLATE ACCORDING TO TABLES 8 AND 10
As stated in the table in section 5, if this screwing diagram is not feasible, a first basic alternative diagram can
be created provided that it meets 3 criteria.
For the high plate:
The following spreadsheet can be used to adapt the recommended drilling diagram to the customer's needs in
terms of:
- Mounting hole positioning
- Screw diameters used
- Number of screws used
The reference values featured below are the test-validated values:
Gross Combination Weight Rating
Thrust force
Height of screws - bumper
Moment (or lever arm)
Drilling diagram width
Drilling diagram height
Number of screws
Screw diameter
Mounting surface area
Thread root cross-section
Maximum shear force**
* Force P2 is limited to 180kN maximum
** The ISO 20898 T1 standard provides the minimum tensile strength for a 10.9 class screw: Rm = 1000 N/mm². The maximum shear stress is commonly calculated
as 70% of Rm, i.e. 700 N/mm².
Parameters recommended by POMMIER (Reference)
GCWR
P2
L
M2
A
Z
N
M
S
Sff
F
Table 7
Figure 16
-
GCWR (in kg) x 0.85 x 9.81
-
P2 x L
-
-
-
-
A x Z
-
Sff x 700 x N / 1000
21,600 kg
180 kN*
623 mm
112,140 kN.mm
200mm
150mm
14
14
30,000 mm²
110 mm²
970 kN
32/143