สกรูหางแปสำหรับระบบหลังคาแบบยืดหยุ่น: คู่มือฉบับสมบูรณ์

Flexible roofing systems require screws with a special tail design that securely anchors insulation boards to steel purlins. FM4470 compliant screws ensure wind uplift resistance. Choose lengths that penetrate the purlin by at least 25mm and use the recommended drill speed to avoid heat damage.