10 Sided Polygon Rafter Table ( 10 - gon )


central angle = 36
working angle = 18
plan angle = 72
miter angle = 3.90 & 12 (18.00)
hip run per foot = 12.62
apothem multiplier = 1.05146
side wall multiplier = 0.64984

Pitch

Roof Angles

Frieze Block Angles

Hip Rafters

Jack Rafters

Roof Pitch

Angle

Hip Pitch

Angle

Angle

Saw Bevel

Side Cut

Angle

Backing Angle

Hip Drop

2x

Hip Drop

4x

Length

Per-FT

Side Cut

Angle

First
12 O.C.

First
16 O.C.

First
24 O.C.

Spaced
12 O.C.

Spaced
16 O.C.

Spaced
24 O.C.

Multiplier

0

0.00

0.00

0

18

18.00

0.00

0.00

0.00

12.62

18

39.12

51.43

76.05

36.93

49.24

73.86

3.07768

1

4.76

4.53

1.55

17.94

17.95

1.47

0.02

0.05

12.66

17.94

39.26

51.61

76.32

37.06

49.41

74.12

3.08835

2

9.46

9.01

3.06

17.75

17.79

2.91

0.04

0.09

12.78

17.77

39.66

52.14

77.10

37.44

49.92

74.88

3.12014

3

14.04

13.37

4.51

17.45

17.54

4.30

0.06

0.14

12.97

17.50

40.33

53.02

78.39

38.07

50.76

76.14

3.17240

4

18.43

17.59

5.87

17.05

17.21

5.61

0.08

0.18

13.24

17.13

41.24

54.21

80.17

38.93

51.91

77.86

3.24416

5

22.62

21.62

7.12

16.57

16.81

6.83

0.10

0.23

13.57

16.70

42.38

55.72

82.39

40.01

53.35

80.02

3.33416

6

26.57

25.43

8.27

16.05

16.35

7.94

0.12

0.27

13.97

16.20

43.74

57.50

85.03

41.29

55.06

82.58

3.44095

7

30.26

29.02

9.30

15.48

15.86

8.96

0.14

0.32

14.43

15.68

45.29

59.54

88.05

42.76

57.01

85.51

3.56305

8

33.69

32.38

10.22

14.90

15.34

9.87

0.15

0.36

14.94

15.13

47.02

61.81

91.41

44.39

59.18

88.77

3.69892

9

36.87

35.50

11.03

14.31

14.82

10.69

0.17

0.41

15.50

14.57

48.90

64.29

95.07

46.17

61.55

92.33

3.84710

10

39.81

38.40

11.75

13.73

14.29

11.41

0.19

0.45

16.10

14.02

50.93

66.95

99.00

48.07

64.10

96.15

4.00625

11

42.51

41.08

12.38

13.17

13.76

12.05

0.21

0.50

16.74

13.47

53.07

69.77

103.17

50.10

66.80

100.20

4.17509

12

45.00

43.56

12.94

12.62

13.25

12.62

0.23

0.54

17.41

12.94

55.33

72.74

107.56

52.23

69.64

104.46

4.35250

13

47.29

45.86

13.43

12.10

12.75

13.12

0.25

0.59

18.12

12.43

57.68

75.83

112.13

54.45

72.60

108.90

4.53748

14

49.40

47.97

13.86

11.60

12.27

13.57

0.27

0.63

18.85

11.94

60.11

79.03

116.86

56.75

75.67

113.50

4.72914

15

51.34

49.93

14.24

11.13

11.81

13.96

0.29

0.68

19.60

11.47

62.63

82.33

121.75

59.12

78.83

118.24

4.92670

16

53.13

51.74

14.57

10.69

11.38

14.31

0.31

0.72

20.38

11.03

65.20

85.72

126.76

61.55

82.07

123.11

5.12947

17

54.78

53.42

14.87

10.27

10.96

14.62

0.33

0.77

21.17

10.61

67.84

89.19

131.88

64.04

85.39

128.08

5.33687

18

56.31

54.97

15.13

9.87

10.56

14.90

0.35

0.81

21.98

10.22

70.53

92.72

137.11

66.58

88.77

133.16

5.54837

19

57.72

56.41

15.36

9.50

10.19

15.15

0.37

0.86

22.81

9.84

73.26

96.32

142.42

69.16

92.22

138.32

5.76353

20

59.04

57.75

15.57

9.15

9.84

15.37

0.39

0.90

23.65

9.49

76.04

99.97

147.82

71.78

95.71

143.57

5.98194

21

60.26

59.00

15.75

8.82

9.50

15.56

0.41

0.95

24.50

9.16

78.85

103.67

153.29

74.44

99.25

148.88

6.20327

22

61.39

60.16

15.92

8.51

9.18

15.74

0.42

0.99

25.36

8.84

81.70

107.41

158.83

77.13

102.84

154.25

6.42721

23

62.45

61.25

16.07

8.22

8.88

15.90

0.44

1.04

26.23

8.55

84.58

111.19

164.42

79.84

106.46

159.68

6.65350

24

63.43

62.27

16.20

7.94

8.60

16.05

0.46

1.08

27.11

8.27

87.48

115.01

170.06

82.58

110.11

165.17

6.88191


Framing Square usage Example: 8:12 Pitch
(Rafter Length Per Ft = 14.42) (Hip Rafter Length Per Ft = 14.94)
SS Angle = Speed Square Angle
Saw Angle produces compound Speed Square Angle
 
Tongue (8.00) Blade (12.00) for Rafter Plumb Cut Angle (SS Angle 33.69)
Tongue (12.00) Blade (8.00) for Rafter Level Cut Angle (SS Angle 56.31)
 
Tongue (8.00) Blade (12.62) for Hip Rafter Plumb Cut Angle (SS Angle 32.38)
Tongue (12.62) Blade (8.00) for Hip Rafter Level Cut Angle (SS Angle 57.62)
 
Tongue (4.10) Blade (14.94) for Hip Side Cut Angle (SS Angle 15.34) (Saw Angle 72.00)
Tongue (2.60) Blade (14.94) for Hip Backing Angle (SS Angle 9.87)
 
Tongue (3.90) Blade (14.42) for Jack Rafter Side Cut Angle (SS Angle 15.13) (Saw Angle 72.00)
 
Tongue (2.60) Blade (14.42) for Purlin Rafter Plumb Cut Angle (SS Angle 10.22) (Saw Angle 9.87)
Tongue (3.90) Blade (14.42) for Purlin Rafter Cross Cut Angle (SS Angle 15.13)
 
Tongue (2.60) Blade (14.42) for Roof Sheathing Plumb Cut Angle (SS Angle 10.22) (Saw Angle 9.87)
Tongue (3.90) Blade (14.42) for Roof Sheathing Cross Cut Angle (SS Angle 15.13)
 
Tongue (8.00) Blade (12.00) for Miter Box Gable Mould Plumb Cut Angle (SS Angle 33.69)
Tongue (8.00) Blade (12.62) for Miter Box 2 Cord Polygon Gable Mould Hip Plumb Cut Angle (SS Angle 32.38)
Tongue (3.90) Blade (12.00) for Miter Box 2 Cord Polygon Gable Mould Hip Cross Cut Angle (SS Angle 18.00) (Saw Angle 18.00)
 
Tongue (2.60) Blade (14.42) for Frieze Block Plumb Cut Angle (SS Angle 10.22)
Tongue (3.90) Blade (14.42) for Frieze Block Cross Cut Angle (SS Angle 15.13) (Saw Angle 14.90)
 
Tongue (2.60) Blade (14.42) for Square Cut Fascia Plumb Cut Angle (SS Angle 10.22)
Tongue (3.90) Blade (14.42) for Square Cut Fascia Cross Cut Angle (SS Angle 15.13) (Saw Angle 14.90)
 
Tongue (0.56) Blade (3.90) for Hip Rafter Square Cut Fascia Plumb Cut Angle (SS Angle 2.65)
Tongue (3.90) Blade (14.42) for Hip Rafter Square Cut Fascia Cross Cut Angle (SS Angle 15.13) (Saw Bevel Angle 14.90)