Table 3 Velocity of ultrasonic wave propagation for the tested beams

From: Typology, current state and non-destructive testing of timber roof trusses of historic churches in the West Vistula Delta, Poland

Beam no.

 

Ultrasonic velocity v (m/s)

  

Church #1

Church #2

Church #3

Church #4

Church #5

Church #6

Truss 1

Beam 1

1733.3

1666.7

1454.5

1810.3

1559.6

1255.8

Beam 2

1521.7

1682.2

1750

2000

1165

1255.8

Beam 3

1503.3

1395.3

1259.8

1666.7

1347.8

1764.7

Beam 4

1811

1652.9

1839.1

1891.9

1422

1703.7

Truss 2

Beam 1

1707.3

1149.4

1681.4

1500

1559.6

1788.1

Beam 2

1631.2

1360

1553.4

1730.8

1621.6

1788.1

Beam 3

1554.1

1730.8

1782.2

1704.5

1025.6

1666.7

Beam 4

1666.7

1818.2

1666.7

1627.9

2083.3

1760

Truss 3

Beam 1

1097.6

1639.3

893.9

1640.6

1634.6

1764.7

Beam 2

1627.9

1792.5

1632.7

1144.1

1161.6

1764.7

Beam 3

1632.7

1610.2

1650.5

1415.1

1648.4

1803.3

Beam 4

1486.5

2777.8

1927.7

1007.2

1851.9

1885.2

Minimum velocity (m/s)

1097.6

1149.4

893.9

1007.2

1025.6

1255.8

Maximum velocity (m/s)

1811

2777.8

1927.7

2000

2083.3

1885.2

Velocity average (m/s)

1581.1

1689.6

1591

1594.9

1506.8

1683.4

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