Purlin Roofing Systems
Designed to reduce the distance the rafters have to span, metal purlins support the loads from the roof deck and help to prevent the roof from sagging. Metal for Roofing offers two types of galvanized purlins:
C Purlin - Cee or C purlins are shaped like a squared-off letter C. They are often used for structural support in walls and as floor joists in addition to roofs.
Z Purlin - The zed or Z purlin is shaped like a letter Z. Its shape allows the purlin to overlap with others at the joints. This gives zed purlins the potential to be much stronger than C purlins. Z Purlins are mainly used in walls or for large roofing projects.
Pre-punching service of steel frame:
In order to make construction on-site faster and easier,steel Z purlins could be pre-punched in our factory.
There is two kinds of holes we have,as per Chinese GB standards,round holes and elongated holes.which is as per the following picture showing:
Holes are made during production at continuous line,some additional notes are showing as follows:
Holes can be made in a row or positions as per your design;
Oval and rectangular holes can be rotated by 90°;
Please contact us for additional information about the pre-punching possibilities,if you have any special hole punching requirement about hole size and hole shapes.
Product advantages:
Ability to span length
Saving in Steel up to 40%
Fast to erect and easy handling
No side drilling/cutting required
Assured dimensions and straightness
Purlin erection is easier than others
Saving in construction cost up to 30%
High durability, versatility and uniform quality
Low transportation cost due to reduced weight
Close tolerances on sectional dimensions owing to process of cold roll forming
Saving up to 35-40% in weight and 20% in cost when compared to hot rolled purlins
Product joint way:
