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Lumber grading > Knots > Flashcards

Knots Flashcards

1
Q

Edge knot for #1 2x4

A

1

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2
Q

Edge knot for #1 2x6

A

1 1/2

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3
Q

Edge knot for #1 2x8

A

2

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4
Q

Edge knot for #1 2x10

A

2 1/2

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5
Q

Edge knot for #1 2x12

A

3

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6
Q

Edge knot for #2 2x4

A

1 1/4

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7
Q

Edge knot for #2 2x6

A

1 7/8

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8
Q

Edge knot for #2 2x8

A

2 1/2

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9
Q

Edge knot for #2 2x10

A

3 1/4

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10
Q

Edge knot for #2 2x12

A

3 3/4

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11
Q

Edge knot for #3 2x4

A

1 3/4

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12
Q

Edge knot for #3 2x6

A

2 3/4

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13
Q

Edge knot for #3 2x8

A

3 1/2

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14
Q

Edge knot for #3 2x10

A

4 1/2

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15
Q

Edge knot for #3 2x12

A

5 1/2

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16
Q

Edge knot for DSS 2x4

A

3/4

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17
Q

Edge knot for DSS 2x6

A

1 1/8

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18
Q

Edge knot for DSS 2x8

A

1 1/2

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19
Q

Edge knot for DSS 2x10

A

1 7/8

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20
Q

Edge knot for DSS 2x12

A

2 1/4

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21
Q

How much skip in a #1

A

Hit and miss

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22
Q

How much skip in a DSS

A

Hit and miss

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23
Q

How much skip in a #2

A

1/16 full length with 2 ft at 1/8

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24
Q

How much skip in a #3

A

1/8 full length

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25
Q

Centerline knot size for a DSS 2x4

A

7/8

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26
Q

Centerline knot for a DSS 2x6

A

1 7/8

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27
Q

Centerline knot for a DSS 2x8

A

2 1/4

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28
Q

Centerline knot for a DSS 2x10

A

2 5/8

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29
Q

Centerline knot for a DSS 2x12

A

3

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30
Q

Centerline knot for a #1 2x4

A

1 1/2

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31
Q

Centerline knot for a #1 2x6

A

2 1/4

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32
Q

Centerline knot for a #1 2x6

A

2 1/4

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33
Q

Centerline knot for a #1 2x8

A

2 3/4

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34
Q

Centerline knot for a #1 2x10

A

2 1/2

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35
Q

Centerline knot for a #1 2x12

A

3 3/4

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36
Q

Centerline knot for a #2 2x4

A

2

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37
Q

Centerline knot for a #2 2x6

A

2 7/8

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38
Q

Centerline knot for a #2 2x8

A

3 1/2

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39
Q

Centerline knot for a #2 2x10

A

4 1/4

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40
Q

Centerline knot for a #2 2x12

A

4 3/4

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41
Q

Centerline knot for a #3 2x4

A

2 1/2

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42
Q

Centerline knot for a #3 2x6

A

3 3/4

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43
Q

Centerline knot for a #3 2x8

A

4 1/2

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44
Q

Centerline knot for a #3 2x10

A

5 1/2

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45
Q

Centerline knot for a #3 2x12

A

6 1/2

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46
Q

Hole size for a #1 2x4

A

1

47
Q

Hole size for a #1 2x6

A

1 1/4

48
Q

Hole size for a #1 2x8

A

1 1/2

49
Q

Hole size for a #1 2x10

A

1 1/2

50
Q

Hole size for a #1 2x12

A

1 1/2

51
Q

Hole size for a #2 2x4

A

1 1/4

52
Q

Hole size for a #2 2x6

A

1 1/2

53
Q

Hole size for a #2 2x8

A

2

54
Q

Hole size for a #2 2x10

A

2 1/2

55
Q

Hole size for a #2 2x12

A

3

56
Q

Hole size for a #3 2x4

A

1 3/4

57
Q

Hole size for a #3 2x6

A

2

58
Q

Hole size for a #3 2x8

A

2 1/2

59
Q

Hole size for a #3 2x10

A

3

60
Q

Hole size for a #3 2x12

A

3 1/2

61
Q

Hole size for a DSS 2x4

A

3/4

62
Q

Hole size for a DSS 2x6

A

1

63
Q

Hole size for a DSS 2x8

A

1 1/4

64
Q

Hole size for a DSS 2x10

A

1-1/4

65
Q

Hole size for a DSS 2x12

A

1-1/4

66
Q

Split allowed in a #3

A

1/6 length

67
Q

Split allowed in a #2

A

1 1/2 x the width

68
Q

Split allowed in a #1

A

Width of piece

69
Q

Allowable wormy pitch in a #2?

A

Knot size

70
Q

Timber break allowed in a number #3

A

Half the hole size?

71
Q

Hole size for a #1 2x4

A

1

72
Q

Hole size for a #1 2x6

A

1 1/4

73
Q

Hole size for a #1 2x8

A

1 1/2

74
Q

Hole size for a #1 2x10

A

1 1/2

75
Q

Hole size for a #1 2x12

A

1 1/2

76
Q

Hole size for a #2 2x4

A

1 1/4

77
Q

Hole size for a #2 2x6

A

1 1/2

78
Q

Hole size for a #2 2x8

A

2

79
Q

Hole size for a #2 2x10

A

2 1/2

80
Q

Hole size for a #2 2x12

A

3

81
Q

Hole size for a #3 2x4

A

1 3/4

82
Q

Hole size for a #3 2x6

A

2

83
Q

Hole size for a #3 2x8

A

2 1/2

84
Q

Hole size for a #3 2x10

A

3

85
Q

Hole size for a #3 2x12

A

3 1/2

86
Q

Hole size for a DSS 2x4

A

3/4

87
Q

Hole size for a DSS 2x6

A

1

88
Q

Hole size for a DSS 2x8

A

1 1/4

89
Q

Hole size for a DSS 2x10

A

1-1/4

90
Q

Hole size for a DSS 2x12

A

1-1/4

91
Q

Split allowed in a #3

A

1/6 length

92
Q

Split allowed in a #2

A

1 1/2 x the width

93
Q

Split allowed in a #1

A

Width of piece

94
Q

Allowable wormy pitch in a #2?

A

Knot size

95
Q

Timber break allowed in a number #3

A

Half the edge knot size

96
Q

Surface shake allowed in a number 2

A

1/4 length

97
Q

Through shake allowed in a number 1

A

None

98
Q

Through shake allowed in a number 2

A

2ft

99
Q

Through shake allowed in a #3

A

1/3 length

100
Q

Surface shake allowed in a number 1

A

Lol

101
Q

Surface shake allowed in a number 3

A

Full length

102
Q

Skip allowed in a number 2 prime

A

1/16 on edge, 1/32 on face

103
Q

Max Wane allowed on a number 1 & DSS

A

1/2 thick, 1/3 wide, 1/4 length

104
Q

Max wane allowed in a number 2

A

2/3 thick, 1/2 width, 1/4 length

105
Q

Wane in a number 3

A

7/8 thick, 2/3 width, 1/4 length

106
Q

Decay in a number 2

A

1/3 thick, 1/3 wide

107
Q

Decay in a number 3

A

1/3 cross sections can not destroy nailing edge

108
Q

Slope in a #1

A

1 in 10

109
Q

Slope in a number 2

A

1 in 8

110
Q

Slope in a number 3

A

1 in 4

111
Q

Slope in DSS

A

1 in 12

112
Q

Nailing edge for a number 1 & DSS

A

3/4”

113
Q

Nailing edge for a number 2

A

1/2”

114
Q

Nailing edge for a number 3

A

3/16”

Lumber grading (1 decks)

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