Cooper Stair Selection Guide

PREASSEMBLED STAIR TREAD RUN CHART

Use this chart to find the length of total run for a stair from rough header to nosed edge of first tread. 2 (add a minimum of 36" to wall)

Run per tread 3

9*

9 1 /

9

1 /

9

3 /

9

1 /

9

5 /

9

3 /

9

7 /

10

10

1 /

10

1 /

10

3 /

11

8

4

8

2

8

4

8

4

2

4

1

11 1 /

11

5 /

11

3 /

11

7 /

12

12

1 /

12

1 /

12

3 /

12

1 /

12

3 /

13

13

1 /

13

1 /

2

8

4

8

8

4

8

2

4

4

2

2

20 1 /

20

3 /

21

21 1 /

21

1 /

21

3 /

22

22

1 /

22

1 /

23

23

1 /

24

24

1 /

2

4

2

4

4

2

2

2

3

29 1 /

29

7 /

30

1 /

30

5 /

31

31

3 /

31

3 /

32

1 /

32

1 /

33

1 /

34

34

3 /

35

1 /

2

8

4

8

8

4

8

2

4

4

2

4

38 1 /

39

39

1 /

40

40

1 /

41

41

1 /

42

42

1 /

43

1 /

44

1 /

45

1 /

46

1 /

2

2

2

2

2

2

2

2

2

5

47 1 /

48

1 /

48

3 /

49

3 /

50

50

5 /

51

1 /

51

7 /

52

1 /

53

3 /

55

56

1 /

57

1 /

2

8

4

8

8

4

8

2

4

4

2

6

56 1 /

57

1 /

58

58

3 /

59

1 /

60

1 /

61

61

3 /

62

1 /

64

65

1 /

67

68

1 /

2

4

4

2

4

4

2

2

2

7

65 1 /

66

3 /

67

1 /

68

1 /

69

69

7 /

70

3 /

71

5 /

72

1 /

74

1 /

76

77

3 /

79

1 /

2

8

4

8

8

4

8

2

4

4

2

8

74 1 /

75

1 /

76

1 /

77

1 /

78

1 /

79

1 /

80

1 /

81

1 /

82

1 /

84

1 /

86

1 /

88

1 /

90

1 /

2

2

2

2

2

2

2

2

2

2

2

2

2

9

83 1 /

84

5 /

85

3 /

86

7 /

88

89

1 /

90

1 /

91

3 /

92

1 /

94

3 /

97

99

1 /

101

1 /

2

8

4

8

8

4

8

2

4

4

2

10

92 1 /

93

3 /

95

96

1 /

97

1 /

98

3 /

100

101

1 /

102

1 /

105

107

1 /

110

112

1 /

2

4

4

2

4

4

2

2

2

11

101 1 /

102

7 /

104

1 /

105

5 /

107

108

3 /

109

3 /

111

1 /

112

1 /

115

1 /

118

120

3 /

123

1 /

2

8

4

8

8

4

8

2

4

4

2

12

110 1 /

112

113

1 /

115

116

1 /

118

119

1 /

121

122

1 /

125

1 /

128

1 /

131

1 /

134

1 /

2

2

2

2

2

2

2

2

2

13

119 1 /

121

1 /

122

3 /

124

3 /

126

127

5 /

129

1 /

130

7 /

132

1 /

135

3 /

139

142

1 /

145

1 /

2

8

4

8

8

4

8

2

4

4

2

14

128 1 /

130

1 /

132

133

3 /

135

1 /

137

1 /

139

140

3 /

142

1 /

146

149

1 /

153

156

1 /

2

4

4

2

4

4

2

2

2

15

137 1 /

139

3 /

141

1 /

143

1 /

145

146

7 /

148

3 /

150

5 /

152

1 /

156

1 /

160

163

3 /

167

1 /

2

8

4

8

8

4

8

2

4

4

2

*Minimum run by code

Notes:

1. Number of treads = One less tread than number of risers 2. This chart includes 2-1/2" (3/4" Top Riser & 1-1/8" overhang on bottom and 5/8 shim space) 3. Run per tread does not include overhang

Riser Height Chart

Use this chart by locating total rise in matrix and select number of risers & rise from shaded areas. More than one option is possible for stairs in excess of 6 risers.

Rise per step

1

7

7 1 /

7

1 /

7

3 /

7

7 /

7

1 /

7

9 /

7

5 /

7

11 /

7

3 /

7

3 /

7

7 /

7

15 /

8

8

1 /

8

1 /

8

3 /

8

1 /

8

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

2

14

14 1 /

14

1 /

14

3 /

14

7 /

15

15

1 /

15

1 /

15

3 /

15

1 /

15

5 /

15

3 /

15

7 /

16

16

1 /

16

1 /

16

3 /

16

1 /

4

2

4

8

8

4

8

2

8

4

8

8

4

8

2

3

21

21 3 /

21

3 /

22

1 /

22

5 /

22

1 /

22

11 /

22

7 /

23

1 /

23

1 /

23

7 /

23

5 /

23

13 /

24

24

3 /

24

3 /

24

9 /

24

3 /

8

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

4

28

28 1 /

29

29

1 /

29

3 /

30

30

1 /

30

1 /

30

3 /

31

31

1 /

31

1 /

31

3 /

32

32

1 /

32

1 /

32

3 /

33

2

2

4

4

2

4

4

2

4

4

2

4

5

35

35 5 /

36

1 /

36

7 /

37

3 /

37

1 /

37

3 /

38

1 /

38

7 /

38

3 /

39

1 /

39

3 /

39

11 /

40

40

5 /

40

5 /

40

15 /

41

1 /

8

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

6

42

42 3 /

43

1 /

44

1 /

44

3 /

45

45

3 /

45

3 /

46

1 /

46

1 /

46

7 /

47

1 /

47

5 /

48

48

3 /

48

3 /

49

1 /

49

1 /

4

2

4

8

8

4

8

2

8

4

8

8

4

8

2

7

49

49 7 /

50

3 /

51

5 /

52

1 /

52

1 /

52

15 /

53

3 /

53

13 /

54

1 /

54

11 /

55

1 /

55

9 /

56

56

7 /

56

7 /

57

5 /

57

3 /

8

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

8

56

57

58

59

59 1 /

60

60

1 /

61

61

1 /

62

62

1 /

63

63

1 /

64

64

1 /

65

65

1 /

66

2

2

2

2

2

2

2

9

63

64 1 /

65

1 /

66

3 /

66

15 /

67

1 /

68

1 /

68

5 /

69

3 /

69

3 /

70

5 /

70

7 /

71

7 /

72

72

9 /

73

1 /

73

11 /

74

1 /

8

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

10 70

71 1 /

72

1 /

73

3 /

74

3 /

75

75

5 /

76

1 /

76

7 /

77

1 /

78

1 /

78

3 /

79

3 /

80

80

5 /

81

1 /

81

7 /

82

1 /

4

2

4

8

8

4

8

2

8

4

8

8

4

8

2

11 77

78 3 /

79

3 /

81

1 /

81

13 /

82

1 /

83

3 /

83

7 /

84

9 /

85

1 /

85

15 /

86

5 /

87

5 /

88

88

11 /

89

3 /

90

1 /

90

3 /

8

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

12 84

85 1 /

87

88

1 /

89

1 /

90

90

3 /

91

1 /

92

1 /

93

93

3 /

94

1 /

95

1 /

96

96

3 /

97

1 /

98

1 /

99

2

2

4

4

2

4

4

2

4

4

2

4

13 91

92 5 /

94

1 /

95

7 /

96

11 /

97

1 /

98

5 /

99

1 /

99

15 /

100

3 /

101

9 /

102

3 /

103

3 /

104

104

13 /

105

5 /

106

7 /

107

1 /

8

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

14 98

99 3 /

101

1 /

103

1 /

104

1 /

105

105

7 /

106

3 /

107

5 /

108

1 /

109

3 /

110

1 /

111

1 /

112

112

7 /

113

3 /

114

5 /

115

1 /

4

2

4

8

8

4

8

2

8

4

8

8

4

8

2

15 105 106 7 / 8

108

3 /

110

5 /

111

9 /

112

1 /

113

7 /

114

3 /

115

5 /

116

1 /

117

3 /

118

1 /

119

1 /

120

120

15 /

121

7 /

122

13 /

123

3 /

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

16 112

114

116

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

17 119 121 1 / 8

123

1 /

125

3 /

126

7 /

127

1 /

128

9 /

129

5 /

130

11 /

131

3 /

132

13 /

133

7 /

134

15 /

136

137

1 /

138

1 /

139

3 /

140

1 /

4

8

16

2

16

8

16

4

16

8

16

16

8

16

4

Max. floor to floor height = 144"

18 126 128 1 / 4

130

1 /

132

3 /

133

3 /

135

136

1 /

137

1 /

138

3 /

139

1 /

140

5 /

141

3 /

142

7 /

144

2

4

8

8

4

8

2

8

4

8

page 42 | www.cooperstairworks.com

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