Pommier A5441 Mode D'emploi page 33

For low plate:
The following spreadsheet can be used to adapt the drilling diagram recommended by POMMIER for low plate
scenarios 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.
The table below provides the characteristics of screws suitable for use
Screw diameter
M12
M14
M16
Parameters recommended by POMMIER (Reference)
GCWR
P2
L
M2
A
Z
N
M
S
Sff
F
Table 8
Thread root diameter
10.11mm
11.84mm
13.84mm
Table 9
-
GCWR (in kg) x 0.85 x 9.81
-
P2 x L
-
-
-
-
A x Z
-
Sff x 700 x N / 1000
Figure 17
21,600 kg
180 kN*
636 mm
125,280 kN.mm
335mm
135mm
8
14
45,225 mm²
110 mm²
616 kN
Thread root cross-section
80 mm²
110mm²
150mm²
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