S-Line round shoring bar with rubber foot

Code

142138813G

Price

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S-Line round shoring bar with rubber foot

Min. stroke (mm)

Max. stroke (mm)

Diameter (mm)

2000

2600

42mm aluminium cargo bar with spring and 2000-2600mm stroke

anti-slip rubber foot

ratchet tensioner for better fastening

patented force display

Blocking capacity: 130daN

DEKRA certified

Further information >>>

Material

anodized aluminium

Weight

4,9 kg

Stock

Lajosmizse

in stock

Szigetszentmiklós

in stock

Load securing by blocking

In case of blocking load securing the load is placed tightly next to each other - typically the foremost load is lied against the headboard -, and the free surfaces are blocked with a proper cargo control device to prevent the whole cargo from sliding. These devices are mainly bars, beams or parting wall locks, but it can be done with lashing straps also.

blocking with the sidewalls of the vehicle — Figure 1 - Simplest example, the cargo area is fully loaded. Cargo securing is provided by the sidewalls of the vehicle.

blocking of partial load — Figure 2 - In case of partial load, it is lied against the headboard and the other end is secured by vertical cargo bars.

segmented blocking — Figure 3 - Even the blocking capacity of the sidewalls or the cargo itself are not limitless. In this case the cargo must be segmented and each segment has to be secured by separate blocking devices.

blocking both ends — Figure 4 - Blocking both ends by horizontal beams and vertical cargo bars.

blocking cargo with different heights — Figure 5 - Blocking cargo with different heights by cargo bars.

blocking by lashing straps — Figure 6 - Blocking by lashing straps.

Calculations, forces

Blocking capacity - BC

The strength of cargo bars, beams and parting walls are described with BC (Blocking Capacity). This value shows the maximum force the blocking device can withstand without moving. These devices can be used to secure even heavier loads than the BC but the exact values have to be calculated.

Acceleration coefficient - c

The vehicle moves (accelerates, brakes, turns etc...) and so the cargo is effected by forces from different directions. In case of road vehicles VDI 2700 standard determines the exact values cargo securing must be planned on. The direction of the motion is important as braking can always cause stronger forces than acceleration.

acceleration coefficients in case of vehicles not exceeding 2 tonnes maximum mass — Figure 7 - Acceleration coefficients in four directions for vehicles **not exceeding 2 tonnes** maximum mass.

acceleration coefficients in case of vehicles between 2 - 3,5 tonnes maximum mass — Figure 8 - Acceleration coefficients in four directions for vehicles **between 2 - 3,5 tonnes** maximum mass.

acceleration coefficients in case of vehicles above 3,5 tonnes maximum mass — Figure 9 - Acceleration coefficients in four directions for vehicles **above 3,5 tonnes** maximum mass.

With the help of the load weight (F_z) and the acceleration coefficient (c) the force applied to the load (F) can be calculated with following formula:

F_z × c = F

Friction factor - μ

Friction factor between the load and the adjoining surface which decreases the force applied to the load. The bigger the friction is the more difficult for the load to move and the smaller BC needed to block the load.
Friction force (F_f) can be calulcated by the weight of the load (F_z) and the friction factor (μ).

F_z × μ = F_f

The friction factor depends the material of adjoining surfaces. The most typical surfaces and their values can be found in EN12195-1:

Table 1 - Friction factors of some usual goods according to EN12195-1.
adjoining surfaces		Friction factor - μ
sawn wood	fabric base laminate/plywood	0,45
sawn wood	grooved aluminium	0,4
sawn wood	shrink film	0,3
sawn wood	stainless steel sheet	0,3
plane wood	fabric base laminate/plywood	0,3
plane wood	grooved aluminium	0,25
plane wood	stainless steel sheet	0,2
plastic pallet	fabric base laminate/plywood	0,2
plastic pallet	grooved aluminium	0,15
plastic pallet	stainless steel sheet	0,15
steel and metal	fabric base laminate/plywood	0,45
steel and metal	grooved aluminium	0,3
steel and metal	stainless steel sheet	0,2
concrete rough	sawn wood battens	0,7
concrete smooth	sawn wood battens	0,55
rubber		0,6

Calculation

The required blocking force (F_B) can be calculated by the difference of the force applied to the load (F) and friction force (F_f).

F_B > F - F_f

After some rearranging we can get the formula for the blocking force.

F_B > (c - μ) × F_z

The number of blocking devices must be increased until the sum of their blocking capacities reaches the minimum required blocking force (F_B).

Example

Lets assume that there are 2 - with a weight of 1200 daN (1200 kg) each - identical pallets on a truck lied to its headboard. The platform is plywood and the pallets are made of wood. We have parting wall locks with 400 daN blocking capacity and because of the limited space we can use only 2 at once. How many parting wall locks we need and is it possible to secure the load under the given circumstances?

We know F_z, which is 2x1200=2400 daN. According to EN12192-1 the acceleration coefficient (c) to the rear direction is 0,5, and the table gives us the friction factor (μ) between plywood and plane wood. It is 0,3. The original formula:

F_B > (c - μ) × F_z

substitution:

F_B > (0,5 - 0,3) × 2400daN

F_B > 480daN

So the situation can be managed with 2 blocking devices with 400daN BC.