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Table 1 The measured geometric and mechanical properties of hooked-end fibres.

From: Comparisons Between Pull-Out Behaviour of Various Hooked-End Fibres in Normal–High Strength Concretes

Fibre type σ au (MPa) σ by (MPa) lf (mm) df (mm) Hook length (mm) Hook angles (°)   Hook height (mm)
L1 L2 L3 L4 θ1 θ2 β H1 H2
3D 65/60 BG 1150 775–985 60 0.90 2.12 2.95 45.7 45.5 67.5 1.85
4D 65/60 BG 1500 1020–1165 60 0.90 2.98 2.62 3.05 30.1 30.8 75.0 4.37 2.20
5D 65/60 BG 2300 1177–1455 60 0.90 2.57 2.38 2.57 2.56 27.9 28.2 76.0 2.96 1.57
  1. aUltimate strength.
  2. bYield strength.