Product Details - Eastern Stringer

The below diagram and chart shows engineered Unsupported Stringer Lengths for Ply-Lam as an Eastern (or Cut-Out) Stringer.

In the below diagram and chart, the Thickness (W) and Effective Depth (ED) of the stringer are adjusted based on the required unsupported length.  

 

 

The chart below uses the above indices and shows the Alberta Building Code Permitted Unsupported Length. All measurements are given in Inches:

   

Product Code

Thickness

   (Width - W)  

Effective Depth

   (ED)  

    AB Code Permitted

  Unsupported Length  

Spruce 2x12, Cut Out, 5.25" remaining 1.5 5.25 99
Spruce 2x10, Cut out, 3.5" remaining 1.5 3.5

69

PL3 C 3.5 1.125 3.5

55

PL3 C 5.25 1.125 5.25

78

PL3 C 8.625 1.125 8.625

135

PL4 C 3.5 1.5 3.5

60

PL4 C 4.625 1.5 4.625

80

PL4 C 5.25 1.5 5.25

86

PL4 C 8.625 1.5 8.625

148

PL6 C 3.5 2.25 3.5

71

PL6 C 4.625 2.25 4.625

95

PL6 C 5.25 2.25 5.25

107

PL6 C 8.625 2.25 8.625

177

PL8 C 3.5 3 3.5

76

PL8 C 4.625 3 4.625

101

PL8 C 5.25 3 5.25

114

PL8 C 8.625 3 8.625

188