FAQs

Embedding in laminar FRP composites

• Are torque-out values the same as permissible tightening torque?

  No. Torque-out values reflect rotational failure of the embedded fastener and do not represent the safe tightening torque for installing a nut or screw.

  Tightening torque must be determined separately based on the specific joint design.

• Can screws pass fully through the laminate when using internally threaded bigHeads?

  Yes – but for sighted (screws pass through) installations, we recommend contacting us first. These cases often require special considerations for configuration geometry, laminate consolidation, and ingress sealing.

• Do reinforced pockets always perform better than unreinforced pockets?

  Reinforced pockets generally offer better load distribution and mechanical performance, especially for pull-out and shear.

  Unreinforced pockets are acceptable where loads are modest or local reinforcement would be complex to implement.

• How do I know if my laminate is thick enough for a flush or inset installation?

  Compare the laminate thickness at the fixing interface with the fastener’s L1 (shoulder/flange) and T (Head) values.

  Flush installations require the laminate thickness to match L1.

  Inset installations require thickness > L1 + T.

• Which embedment configuration should I choose for my application?

  • Flush works for thin laminates.
  • Inset generally offers higher strength where laminate thickness allows.
  • Pocketed is useful when reinforcement continuity is required.
  • Through configurations suit applications needing a balance of maximised embedment strength with minimum reinforcement/preform disruption.