Purlin Fastening Screws
Fastening to steel purlins depends on the support thickness, connected build-up, required embedment, drilling capacity and exposure condition. JOPAL provides technical selection support for suitable self drilling screw configurations.
Products connected to this application.
BIFIX-CS-48-1PBIFIX® 4.8XL 1P EcoZinView technical product
BIFIX-CS-55-63-3PBIFIX® 5.5XL & 6.3XL 3P EcoZinView technical product
BIFIX-CS-HT-3PBIFIX® 5.5XL & 6.3XL High Thread 3P EcoZinView technical product
BIFIX-CS-55-5PBIFIX® 5.5XL 5P EcoZinView technical product
BIFIX-BM-55-63-3PBIFIX® Bi-Metal Stainless Steel 304 5.5XL & 6.3XL 3P UltraZinView technical product
BIFIX-BM-HT-3PBIFIX® Bi-Metal Stainless Steel 304 5.5XL & 6.3XL High Thread 3P UltraZinView technical product
BIFIX-BM-55-5PBIFIX® Bi-Metal Stainless Steel 304 5.5XL 5P UltraZinView technical product
BIFIX-SS304-48-1PBIFIX® SS304 4.8XL 1PView technical productWhat matters for this connection.
Fastener selection
Select the drill point for the actual purlin steel thickness and confirm the connected-sheet or panel build-up, screw length and required thread engagement beyond the support.
Installation control
Install perpendicular to the purlin and allow the drill point to cut before full thread engagement. Use controlled driving to achieve firm clamping without stripping the thread or damaging the washer.
Connection checks
Check support thickness, drill capacity, pull-out demand, connected-sheet pull-over, connection build-up, washer requirement and environmental exposure.
Common questions for this application.
What is the key selection parameter for screws fastening into steel purlins?
The drill point must suit the actual purlin thickness. Screw length and thread engagement must then suit the complete connection build-up.
Why should drilling capacity and screw length be checked separately?
A long screw can still have a drill point intended for a different steel-thickness range. Length does not define the drilling capability of the fastener.
What connection failures should be considered at a purlin fixing?
Selection should consider the complete connection, including fastener pull-out from the support and local pull-over of the connected sheet or panel.