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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
Centerline knot size for a DSS 2x4
7/8
26
Centerline knot for a DSS 2x6
1 7/8
27
Centerline knot for a DSS 2x8
2 1/4
28
Centerline knot for a DSS 2x10
2 5/8
29
Centerline knot for a DSS 2x12
3
30
Centerline knot for a #1 2x4
1 1/2
31
Centerline knot for a #1 2x6
2 1/4
32
Centerline knot for a #1 2x6
2 1/4
33
Centerline knot for a #1 2x8
2 3/4
34
Centerline knot for a #1 2x10
2 1/2
35
Centerline knot for a #1 2x12
3 3/4
36
Centerline knot for a #2 2x4
2
37
Centerline knot for a #2 2x6
2 7/8
38
Centerline knot for a #2 2x8
3 1/2
39
Centerline knot for a #2 2x10
4 1/4
40
Centerline knot for a #2 2x12
4 3/4
41
Centerline knot for a #3 2x4
2 1/2
42
Centerline knot for a #3 2x6
3 3/4
43
Centerline knot for a #3 2x8
4 1/2
44
Centerline knot for a #3 2x10
5 1/2
45
Centerline knot for a #3 2x12
6 1/2
46
Hole size for a #1 2x4
1
47
Hole size for a #1 2x6
1 1/4
48
Hole size for a #1 2x8
1 1/2
49
Hole size for a #1 2x10
1 1/2
50
Hole size for a #1 2x12
1 1/2
51
Hole size for a #2 2x4
1 1/4
52
Hole size for a #2 2x6
1 1/2
53
Hole size for a #2 2x8
2
54
Hole size for a #2 2x10
2 1/2
55
Hole size for a #2 2x12
3
56
Hole size for a #3 2x4
1 3/4
57
Hole size for a #3 2x6
2
58
Hole size for a #3 2x8
2 1/2
59
Hole size for a #3 2x10
3
60
Hole size for a #3 2x12
3 1/2
61
Hole size for a DSS 2x4
3/4
62
Hole size for a DSS 2x6
1
63
Hole size for a DSS 2x8
1 1/4
64
Hole size for a DSS 2x10
1-1/4
65
Hole size for a DSS 2x12
1-1/4
66
Split allowed in a #3
1/6 length
67
Split allowed in a #2
1 1/2 x the width
68
Split allowed in a #1
Width of piece
69
Allowable wormy pitch in a #2?
Knot size
70
Timber break allowed in a number #3
Half the hole size?
71
Hole size for a #1 2x4
1
72
Hole size for a #1 2x6
1 1/4
73
Hole size for a #1 2x8
1 1/2
74
Hole size for a #1 2x10
1 1/2
75
Hole size for a #1 2x12
1 1/2
76
Hole size for a #2 2x4
1 1/4
77
Hole size for a #2 2x6
1 1/2
78
Hole size for a #2 2x8
2
79
Hole size for a #2 2x10
2 1/2
80
Hole size for a #2 2x12
3
81
Hole size for a #3 2x4
1 3/4
82
Hole size for a #3 2x6
2
83
Hole size for a #3 2x8
2 1/2
84
Hole size for a #3 2x10
3
85
Hole size for a #3 2x12
3 1/2
86
Hole size for a DSS 2x4
3/4
87
Hole size for a DSS 2x6
1
88
Hole size for a DSS 2x8
1 1/4
89
Hole size for a DSS 2x10
1-1/4
90
Hole size for a DSS 2x12
1-1/4
91
Split allowed in a #3
1/6 length
92
Split allowed in a #2
1 1/2 x the width
93
Split allowed in a #1
Width of piece
94
Allowable wormy pitch in a #2?
Knot size
95
Timber break allowed in a number #3
Half the edge knot size
96
Surface shake allowed in a number 2
1/4 length
97
Through shake allowed in a number 1
None
98
Through shake allowed in a number 2
2ft
99
Through shake allowed in a #3
1/3 length
100
Surface shake allowed in a number 1
Lol
101
Surface shake allowed in a number 3
Full length
102
Skip allowed in a number 2 prime
1/16 on edge, 1/32 on face
103
Max Wane allowed on a number 1 & DSS
1/2 thick, 1/3 wide, 1/4 length
104
Max wane allowed in a number 2
2/3 thick, 1/2 width, 1/4 length
105
Wane in a number 3
7/8 thick, 2/3 width, 1/4 length
106
Decay in a number 2
1/3 thick, 1/3 wide
107
Decay in a number 3
1/3 cross sections can not destroy nailing edge
108
Slope in a #1
1 in 10
109
Slope in a number 2
1 in 8
110
Slope in a number 3
1 in 4
111
Slope in DSS
1 in 12
112
Nailing edge for a number 1 & DSS
3/4”
113
Nailing edge for a number 2
1/2”
114
Nailing edge for a number 3
3/16”

Lumber grading (1 decks)

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