z pulin sizes

[agrotron]

We are putting a shed up and it is 6m bays. It 3 bays long by 23ft deep. Single pitch and open at the front to put machinery in.

The cleats are for 177mm z purlins but have just come to order them and they come in different thickness. The roof is 0.7mm profile sheets with a 5 degree pitch. We are near Chester so dont get much snow compared to north Scotland.

What thickness should i get? I cant make much scene of the spec sheet. Options are 1.4,1.6,1.8,2,2.5 I am thinking 2mm.

Thanks in advance.

Agrotron

 

[Hesston4860s]

My 100x50 with fibre cement roof has 177 z purlins @ 1.8mm thick on 6m bays !.

 

[Pan mixer]

Thick as you can afford, they do rust in the end and weaken.