Kuat Tarik dan Tekan Kayu
Batang Tarik ( Mutu Kayu ) ukuran 100/120 mm Tu ≤ λ.ф𝑡 .𝑇 ′ λ = 0,6 Cm = 1 Ct = 1 Cf = 1 Ft = 33,6 Mpa
Ft = 0,8.Ft
( Rasio tekanan kayu kelas mutu A = 0,8)
Ft’ = 0,8 x 42 = 33,6 Mpa
F2II = 42 ( table 2.11 )
T’ = F1’ . An = 33,6 . ( Cm . Ct . Cf . b . h ) = 33,6 . 1 . 1 . 100 . 120 = 403200
Tu ≤ λ.ф𝑡 .𝑇 ′ Tv ≤ 0,6 . 0,8 . 403200 46000 ≤ 193536 => ( Batang Tarik kuda - kuda aman )
Batang Tekan Cm = 0,8 ( table 3.31 ) Ct = 1 Cf = 1 Ft = 37 Mpa (tabel 2.1) Fc = 0,8 x 37 = 29,6 Mpa Ew = 18000 ( table 2.1 ) Ew = 0,8 x 18000 = 14400 Mpa