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1D items

For 1D items, the spraying surface for powder coating is calculated in m2 as: length (L) times profile circumference (O):  m2 = L x O

Examples of 1D items

Figure 1 - Profiles and hollow bars

m2 = L x O with a minimum profile circumference of 0.15 mper metre.

Figure 2 - Profiles

m2 = L x O with a minimum profile circumference of 0.15 m2 per metre.

Figure 3 - Composite profile

m2 = L x (O1 + O2)


The spraying surface is alos used for a composite profile with two corner profiles.

 

In practice, the surface area of the connecting strips may not be included in the calculation.

Figure 4 - Hollow profile with tabs and footplate

m2 = L x O 

The 5% rule applies to welded parts such as welded tabs and footplates:

 

If the spraying surface of the welded parts is between 2% and 8% of the spraying surface of the main profile, a factor of 5% of the spraying surface of the main profile is applied for the welded parts.

 

If the spraying surface of the welded parts is less than 2% of the spraying surface of the main profile, no factor is applied.

 

If the spraying surface of the welded parts exceeds 8% of the spraying surface of the main profile, the welded parts are measured and calculated.

Figure 5 - Composite HEA 160 profile

m2= (L x O) + (L x O)

 

In the case of two profiles welded together, the sum of Length times Profile circumference for both profiles separately is used.

 

The item must not be larger than 500 mm x 500 mm; otherwise it is no longer a 1D item.