The advantages of C purlin machine AUTOMATIC size-change type are as follows:

1.Produce different purlin size without changing rollers or spacers.

2.No need changing cutter for different size.

3.Easy operation, low maintenance cost

4.Infinite sizing(any size within machine range),help to save material

5.Optional Punch hole at any position of purlin web side and flange side

Steel purlin profile design

3", 4", and 6" C-purlins refer to the depth (height) of the purlin profile, which is the vertical part of the "C" shape.

These sizes are commonly used in construction for supporting roofing and cladding.

Applications by Size

✅ 3" C-Purlin (75 mm)

• Carports

• Small sheds

• Ceiling joists

• Partition walls

• Short roof spans (typically < 2.5 m)

✅ 4" C-Purlin (100 mm)

• Garages

• Small warehouse roofs

• Pergolas

• Purlins in medium-span roofs (2.5–4.0 m)

✅ 6" C-Purlin (150 mm)

• Large sheds or barns

• Industrial buildings

• Purlins or girts in long-span roofing (4.0–6.5 m or more)

• Strong framing for walls and floors

(6) Length inaccuracy can be amended easily.