Ulma MK Structure - Page 48

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MK
MK MK
MK STRUCTURE
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STRUCTURE
5.1.11. JACK WALER MK
The jack waler is studied for the stripping at a 250 mm distance from the supporting areas of the posts. These
areas have to be properly stiffened.
F = 360 kN (SLS)
F = 360 kN (SLS)F = 360 kN (SLS)
F = 360 kN (SLS)
Technical properties of the Jack Waler MK:
m = 72.4 (kg/m) weight/m
A = 92.24 10
-4
(m
2
) net section area (without holes)
Av
zz
=42.16 10-4 (m
2
) shear area Av
yy
=62.90 10-4 (m
2
) shear area
I
yy
= 8590 10
-8
(m
4
) moment of inertia I
zz
= 5274 10
-8
(m
4
) moment of inertia
W
elyy
= 687 10
-6
(m
3
) Young's modulus W
elzz
= 376 10
-6
(m
3
) Young's modulus
f
y
= 355 (MPa) yield strength
The maximum permissible bending moment and shear force of the connection is:
8 bolts M24x60 8.8
Mmax
yy
(SLS) = 75 kNm ∼ 45 % waler strength
Tmax
yy
(SLS) = 300 kN
8 bolts M24x60 10.9
Mmax
yy
(SLS) = 100 kNm ∼ 60 % waler strength
Tmax
yy
(SLS) = 375 kN
T