Fmo

Buckling resistance condition (5.3.1

Relative slenderness about the y -y Xrel.y = — • / —— Xrel.y = 2.32 axis, Xrel.y (Equation (5.3); EC5, n V E^05

As the relative slenderness ratio is greater than 0.3, conditions in 5.3.1 apply

Factor j3c for solid timber (equation j3c = 0.2 (5.6); EC5, equation (6.29))

Factor ky

Instability factor about the y-y axis (equation (5.4a); EC5, equation (6.25))

1 + Pc ■ C^reLy - 0.3) + ^l.y ky + J ky2 - 4l.y ky — 3.39

Strength condition (equation 5.12)

The relationship is less than unity; therefore the 44 mm by 100 mm studs, strength class C16, will meet the ULS compression strength requirement of EC5.

7. Bearing strength of sole plates

Design bearing load at the base of a stud, Nd

Design bearing stress on the sole CTc.90.d = — plate, ac,90,d - assume no spread of load - to give a safe result

Design bearing strength, /c.90.d, (ignoring enhancement of kc 90 allowed in EC5)

0 0

Post a comment