Question

0/2 pts Question 2 What Bending Unit Stress (Fb') value would be correct for the following description: Doug-Fir 2x8 No.2 grade used 16" 0.c. for floor joists Hint: Don't forget the modifiers!! 1035 psi swer 1242 psi ered 1080 psi 1080 psi O 900 psi

Answer 1

for Douglas Fir Larch No. 2 grade 2x8, from manual, For goo psi Cr= 1.15 ( Repetetive member factor) SAC : (12/8)9 (12/8)" = 1.045 ( size fechor) Cu = 1.15 (for 8 deep & 2" (wide) ( Plate use factor) Cm=1.0 (wet service factoon). fo= P x Ca x + Cafux Com '= goox 1.045x 1.15 x 1.15*1.0 Fol= 1243.8 psi I fó ² 1242 psi Option B - Ans.