Why Expansion clip should be used for long length roofing?

Why Expansion clip should be used for long length roofing?

The metal sheet roof mostly uses in the big building such as factory, warehouse, department store and etc. Those will be designed with a low sloping roof.

The metal sheet roof mostly uses in the big building such as factory, warehouse, department store and etc. Those will be designed with a low sloping roof to make the building height and cost saving, so Boltless and 360 Seam roofing system is more suitable than Bolt system because the advantage of waterproofing and rolled-form long length without end lap (read more information "Type of fixing system")

Boltless and 360 Seam roofing system is more suitable than Bolt system because the advantage of waterproofing and rolled-form long length without end lap

Thermal expansion

Naturally, steel will expand and contract with changes in the temperature. The roof will get the sun light directly causing the temperature at the steel roof surface can reach to 70-80 Degrees Celsius on a hot day. If the roof sheet has 70-meter long, it will expand up to 70 mm in longitudinal movement. If the roof sheet has 100-meter long, it will expand up to 100 mm. which the expansion will normally appear between the end of sheet and the last support, the movement at each end is only half the total expansion or contraction.

To prevent the problems from the expansion and contraction, the suggestions are as below:

1. For 360 Seam roofing system, it must use Expansion clip (Move Clip) having the special designed for the clip to support the expansion and contraction. It can make the continuous length sheet up to 70 meters in KS TripleSeam65, KS TripleSeam110, and KS TriPro75

Move Clip (Expansion Clip)

2. For Boltless roofing system, in case of sprung-curve roof and very long run of roofing it should use “Expansion joint detail” to overcome linear thermal expansion
3. For Bolt system, it will be specified the maximum sheet length of 24 meters to prevent the sheet cutting the screw

Conclusion

Expansion clip (Move Clip) has the special designed for the clip to support the expansion and contraction. It can make the continuous length sheet up to 70 meters in KS TripleSeam65, KS TripleSeam110, and KS TriPro75. It mostly uses with the big building such as factory, warehouse, department store and etc. designed as a low sloping roof to make the building height and cost saving.

Thank you for your trust in the use of KS Group products and services.

By KS Group

STP Engineering & Supply Ltd.