Top Hat are typically used to span across horizontal girts, such as C or Z purlins. The wider flange either side of a Top Hat allows for the direct fixing of Top Hats to the girts.

Knauf Metal manufactures a large range of standard Top Hat sizes but can custom roll form many other variations with our state of the art roll former.

The width across the face can be made from 35mm – 120mm, leg height can be made from 15mm – 75mm. These variations can be manufactured from 0.55, 0.75 or 1.15bmt material as required.

Standard Top Hat Profiles are available in 3600mm, 6000mm & 7200mm lengths.

For span tables refer to the Knauf Metal Steel Wall Systems Manual and Façade Systems Manual.

Standard Top Hat Sizes

Top Hat

Thickness 
BMT (mm)

Depth
 (mm)

Length
 (mm)

3600

6000

7200

ATH50

1.15

15

 

25

 

 

35

ATH75

1.15

35

ATH120

1.15

35

Refer to Knauf Metal Manual for more information and installation instructions.