Table 3: Characteristic points and ductility coefficients.

Specimen	Direction	Yield point		Peak point			Limit point		Δu/Δy
		Py /kN	Δy /mm	Pm/kN	Average /kN	Δm /mm	Pu /kN	Δu /mm
BW01	Push	609	8. 32	791	831	28. 54	672	69. 03	10. 24
	Pull	569	4. 55	870		41. 08	854	62. 82
BSW1	Push	589	7. 10	786	839	45. 45	770	59. 90	7. 79
	Pull	653	7. 12	891		44. 99	892	50. 90
BDW1	Push	646	11. 83	922	960	72. 62	823	87. 53	7. 68
	Pull	609	9. 28	997		60. 91	884	74. 63