User information Doka forming wagon T
17
999771002 - 08/2008 Ü
The Formwork Experts
Determining ballast weight
The diagram for determining ballast weight makes
it easier to find which weight of ballast is required
on a standard version of forming wagon. It makes
the following design assumptions:
●
Length of formwork 5 m
●
Ballast position: dimension c=130 cm
●
Dimensions a and b: see diagram lines
●
Weight of formwork per unit: 400 kg
●
Dead weights incl. lowered platform (Suspension
beam extension 1.00m and 1.00 m extra width)
●
Pouring platform at same height as formwork
●
Live loads per unit:
- when Pressure prop T is in place
Permitted service load: 1.5kN/m
2
(150 kg/m
2
)
Load Class 2 to EN 12811-1:2003
- when Pressure prop T is removed
(situation during travel - 4 kN)
For project-specific deviations (e.g. deviations in
the centre-of-gravity position), separate calcula-
tions must be performed.
a ... Standard 120 cm
b ...220.0 to 375.0 cm
c ... min. 130.0 cm
d ... max. 220.0 cm
Diagram for determining the ballast weight
Length of ballast
A Pressure prop T
B Centre of gravity of ballast
C Spindle strut GS T6 95/140cm
X Cross-section of the edge kerb having an effect on the load
Risk of tipping over!
➤
Dimension "c" for the centre of gravity of
the ballast MUST be strictly observed!
Sufficient ballast must be provided to
ensure stability at all times, including during
the erection and dismantling phases.
9730-258-01
a
d
c
b
B
A
C
X
Ballast [kN] (w/o
weat
herpro
ofin
g t
a
rp.)
Cross-section (X) of the edge kerb [m
2
]
Curve
Dimension a [cm]
Dimension b [cm]
A
120
220
B
120
295
C
50
220
D
120
375
E
50
295
F
w/o pressure prop
220
G
50
375
Dimension e [cm]
max. 240.0
If the ballast is longer than this,
the rear spindle struts can no
longer be turned.
min. 220.0
Where the ballast is shorter
than this, a revised static calcu-
lation must be produced for
the supporting profiles
9730-101
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
A
C
E
G
B
D
F
9730-300-01
e
