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Prof. Elsayed Galal
Prof. Elsayed Galal
Arab Academy for Science, Technology & Maritime Transport
College of Engineering & Technology
Construction and Building Engineering Department
Design Non-Traditional Formwork
a) Peri System.
b) Doka System.
c) SGB System.
Design Non-Traditional Formwork
Bearing Towers
C) DOKA Bearing Towers
Design Non-Traditional Formwork
Bearing Towers
when ≥ 5.5
C) DOKA Bearing Towers
System advantages:
1- Easy to handle for high-speed working
2- Highly cost-efficient for all building-construction shoring needs.
3- Maximum safety even with large shoring heights.
Areas of use
1)In building construction (e.g. hotel entrance lobbies)
2)For low slab loads
3)Optimized for shoring-tower superstructures that use double
H20 beams as their primary beams.
4)Ideal for use on slab heights ≥ 5.5
5)For safe shoring of slab-edges
6)For low-load applications in civil-engineering projects (e.g.
cantilever slabs on bridges)
tower-to-tower walkway
Brackets for safe working at the
slab-edge
Design Non-Traditional Formwork
Bearing Towers
C) DOKA Bearing Towers
Basic design concept
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Basic design concept
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Basic design concept
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Basic design concept
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Basic design concept
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Practical examples
Design Non-Traditional Formwork
C) DOKA Bearing Towers
In building construction, e.g. entrance lobbies Tableform units
For repetitive use, the load-bearing tower
can be assembled into complete table-forms.
Practical examples
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Edge floor-beam
Practical examples
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Practical examples
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Assembling towers in the upright: with “mounted-ahead” 1.20m frames
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Head adjustment
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Head zone
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Base zone
shifting wheel
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Base zone
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Structural Design
Tables
Structural Design
Tables
Design Non-Traditional Formwork
C) DOKA Bearing Towers
It is required to design a non – traditional formwork system for an elevated
concrete floor slab using the following data:
Slab thickness =280 mm.
height= 6 m, use Load bearing tower for high rise.
Sheathing will be plywood class (1).
Main and secondary beams will be high performing.
Weight of forms= 0.5 Kpa.
L.L= 2.5 Kpa.
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
4.0 m
2.5
m
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
•D.L:
. .= × ɣ = 0.28 × 25 =7
. . = 0.5
∴ . =7+0.5 = 7.5
•L.L:
. = 2.5 > 2.4
Check:
∴ V. =7.5 +2.5 = 10 > 4.8
Step(1): Vertical Load
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Step(2): Use sheathing Plywood 21mm Class (I):
A)STRUCTURE SYSTEM:
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Use q = 10
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Step(3): Use Sec. beams H20
A)STRUCTURE SYSTEM:
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Use q = 5
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Step(4): Use Main. beams Composite H20
A)STRUCTURE SYSTEM:
/ ’ =10×1.25 = 12.5 .
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Use q = 12.5
Solved Example
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Step(5):Calculating Fh, h
height= 6 m
Slab thickness =280 mm.
Plywood = 21mm
Fh =
(2*1.80)+(1*1.2) = 4.8 m
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Solved Example
Fh =
(2*1.80)+(1*1.2) = 4.8 m
Use 4.9 > 4.8 m
Design Non-Traditional Formwork
C) DOKA Bearing Towers
Solved Example
THANKS

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CB 525-Method III- Dr Elsayed --Lect. 5 2023-2024.pdf