Peri MULTIFLEX Operator's manual

MULTIFLEX
Girder Slab Formwork
Edition 08 l 2014
Instructions for Assembly and Use – Standard Configuration

MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration
Content
Introduction
Overview, Main Components 1
Intended Use 2
Misapplications 2
General Safety Instructions 3
Safety Instructions System-Specific 4
Additional Product Information 4
Care and Maintenance Instructions 5
Assembly and Dismantling
A1 Storage and Transportation 6
A2 Components
Plywood Formlining 7
Formwork Girders 8
Slab Props, Formwork Support 11
Assembly Aids, Shuttering Aids 12
A3 Shuttering
Shuttering 14
Formwork Assembly 16
A4 Guardrails, Stopend Formwork
At the Slab Edge 17
On Casting Segments 17
A5 Striking 18
A6 Beams, Stopend Formwork
With Beam Formwork UZ 20
With Stopend Angle AW 21
A7 Example of Use 22
A8 Dimensioning of the Slab Formwork 24
Tables
Formlining 26
GT 24 as Slab Girder 28
VT 20 as Slab Girder 30
2 x GT 24 as Main Girder 32
2 x VT 20 as Main Girder 34
PEP Slab Props 36
MULTIPROP Slab Props 44
Beam Formwork UZ 46
Stopend Angle AW 47
Components
Components 48
Key
Safety Instructions
Note Tip PSAgA
Visual Check Load-Bearing Point Safety helmet Safety goggles
Safety gloves Safety shoes

1
1a Main Beam
1b Cross Beam
2 Crosshead
3 Clawhead
4 Prop
5 Tripod
6 Formwork Panel
7 Flexclip
1a
3
4
1b
6
5
2
7
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration
Introduction
Overview, Main Components

2
Features
PERI MULTIFLEX is a flexible girder slab
formwork system for slab thicknesses
up to 1.00 m.
The formwork consists of main beams
and cross beams, plywood formlining
along with crossheads and clawheads.
The following main beam / cross beam
combinations are possible:
VT 20 /VT 20,
GT 24 / VT 20,
GT 24 / GT 24.
Users may select the type of formlining
required.
Technical Data
GT 24 as main beam and crossbeam
Slab thicknesses up to 1.00 m
VT 20 as main beam and crossbeam
(presented in the following)
Slab thickness up to 0.50 m
GT 24 as main beam, VT 20 as
crossbeam
Slab thickness up to 0.50 m
2 x GT 24 as main beams
1 x GT 24 as crossbeam
Slab thicknesses up to 1.00 m
2 x VT 20 as main beams
1 x VT 20 as crossbeam
Slab thicknesses up to 1.00 m
For permissible slab thicknesses and
available prop loads: see PERITables.
Introduction
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration
General
The use in a way not intended, deviating
from the standard configuration or the
intended use according to the assembly
instructions, represents a misapplication
with a potential safety risk.
Only PERI original components may be
used. The use of other products and
spare parts represents a misapplication
with associated safety risks.
Changes to PERI components are not
permitted and represent a misapplica-
tion with associated safety risks.
A possible foreseeable misapplication
is described in the respective chapter.
Intended Use
Misapplications
The illustration on the front cover of
these assembly instructions is under-
stood to be a system representation
only. The structures shown in these
assembly instructions are examples and
feature only one component size. They
are valid for all component sizes con-
tained in the standard configuration.
For a better understanding, detailed
illustrations are partly incomplete. The
safety installations which have possibly
not been featured in these detailed
drawings must nevertheless be available.

3
Introduction
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration
General
PERI products have been designed for
exclusive use in the industrial and com-
mercial sectors only by suitably trained
personnel.
These assembly instructions serve as
basis for the project-related risk assess-
ment and the instructions for the
provision and use of the system by the
contractor (user). However, they are
not intended to replace them.
Materials and working areas are to be
inspected on a regular basis especially
before each use and assembly, and
checked for signs of damage as well
as stability and functionality. Damaged
components must be exchanged
immediately on site and may no longer
be used.
Safety instructions and permissible
loads must be observed at all times.
Remove safety components only when
they are no longer required or if the
official representative of the contractor
gives instructions for this to take place.
For the application, inspection and repair
of our products, all current safety regula-
tions and guidelines must be observed
in the respective countries where they
are being used.
Storage and Transportation
Do not drop the components.
Store and transport components ensur-
ing that no unintentional change in their
position is possible. Detach lifting gears
from the lowered units only if they are in
a stable position and no unintentional
change is possible.
During the moving procedure, ensure
that components are picked up and set
down so that unintentional falling over,
falling apart, sliding or rolling is avoided.
Use only suitable load-carrying equip-
ment to move the components as well
as the designated load-bearing points.
During the moving procedure, always
use a guide rope.
Move components on clean, flat and
sufficiently load-bearing surfaces only.
Use original PERI storage and transport
systems, e.g. crate pallets, pallets or
stacking devices.
Safety Instructions
Components provided by the contractor
must conform with the characteristics
required in these assembly instructions
as well as with all valid construction
guidelines and standards. In particular,
the following applies if nothing else is
specified:
– timber components: Strength Class
C24 for Solid Wood according to
EN 338.
– scaffold tubes: galvanised steel
tubing with minimum dimensions
Ø 48.3 x 3.2 mm according to
EN 12811-1:2003 4.2.1.2.
– scaffold tube couplings according
to EN 74.
Deviations from the standard configura-
tion may only be carried out after a
separate risk assessment has been
completed by the contractor (user).
On this basis, appropriate measures for
the working safety and stability are to
be implemented.
The contractor must ensure that the
assembly instructions provided by PERI
are available at all times for the users
and must ensure they are also fully
understood.
During unfavourable weather conditions,
suitable precautions and measures are
to be implemented in order to guarantee
working safety and stability.
After exceptional events or long periods
of downtime whereby the formwork or
sub-structure was not used, the unit and
its components must be checked for
signs of damage as well as stability and
functionality.
The contractor (user) must ensure the
stability throughout all phases of con-
struction. He must ensure and verify
that all loads which occur are safely
transferred.
The contractor (user) has to provide safe
working areas for site personnel which
are to be reached through the provision
of safe access ways. Areas of risk must
be cordoned off and clearly marked.
Hatches and openings on accessible
working areas must be kept closed
during working operations.
The contractor must ensure that the
user fulfils the minimum requirements
for personal protective equipment, e.g.:
– Safety gloves,
– Safety helmet,
– Safety shoes,
– Safety goggles,
– PSAgA.
Residual Risks
The materials and components fully
complied with all valid safety regulations
at the time when they were first availa-
ble on the market. Nevertheless, a resid-
ual risk cannot be excluded even when
used as intended.
Possible residual risks and the resulting
dangers are described in the respective
chapter.

4
System-specific
Retract components only when the
concrete has sufficiently hardened and
the responsible person has given the
instructions to strike.
Anchoring is to take place only if the
anchorage has sufficient concrete
strength.
During striking, do not tear off the
formwork elements with the crane.
The existing prop loads (see tables)
must be safely transferred by means
of sufficiently load-bearing slab props
or shoring systems.
When storing heavy items on the
formwork, the load-bearing capacity
must be taken into consideration.
Cantilevers may only be accessed after
bracing has been mounted.
The horizontal fixed position of the slab
formwork must be guaranteed. This is
given with circumferential walls and
pre-concreted beams. Otherwise, the
transfer of the horizontal loads has to be
guaranteed by means of other measures
supplied by the contractor, e.g. bracing.
Load assumptions for horizontal loads in
accordance with DIN EN 12812.
In order to avoid an overloading of the
integrated temporary props, the load-
bearing capacity of the slabs, bottom
plates and beams which have already
been completed must be activated. For
this, a free deflection possibility of these
components is required. This takes place
by releasing and re-installing all existing
temporary props, and is also required for
formwork systems where the prop head
is an integral part of the slab formwork.
For supporting pre-cast slabs, details
provided by the manufacturer are also
to be taken into consideration.
Safety Instructions
Introduction
– Assembly Instructions: VARIODECK
– Instructions for Use: Pallets and Stacking
Devices
– Instructions for Use: Stripping Cart
ASW 465
– Instructions for Use: Stripping Cart Alu
– PERI Design Tables
– MULTIFLEX brochure
– GT 24 Girder user information
– VT 20 Girder user information
– Assembly Instructions: PEP Ergo, PEP
– Assembly Instructions: MULTIPROP MP
– Assembly Instructions: MULTIPROP
System
Additional PERI Product Information
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

5
Steel brushes or hard metal scrapers
must not be used for cleaning powder-
coated elements or accessories. Such
cleaning processes will destroy the
high-quality powder coating.
Use spacers for reinforcement with
large-area support or flat supports. This
prevents indentations being created in
the formlining by the load.
Mechanical components, such as
spindles or gear mechanisms, must
be cleaned of dirt or concrete residue
before and after use, and then greased
with suitable lubricants.
Box outs and built-in parts should be
fixed with double-headed nails. This
makes it easier to remove the nails
later on and prevents damage to the
formlining to a great extent.
Any unneccessary anchor holes should
be sealed with plugs. As a result, this
eliminates subsequent cleaning or repair
work. Anchor holes accidentally blocked
with concrete are freed by means of a
steel pin from the formlining side.
When putting down bundles of rein-
forcement bars or other heavy objects
on horizontally-stored formwork ele-
ments, suitable support items, e.g.
square timbers, are to be used. This
prevents indentations and damage
being caused to the formlining.
If possible, concrete internal vibrators
are to be used with rubber caps. This
reduces the risk of damage to the
formlining if accidentally “inserting”
the internal vibrator between the
reinforcement and formlining.
The elements should not be treated with
concrete release agent immediately
before transport due to safety reasons.
Formwork
Regular cleaning and care is necessary
in order to maintain the value and
usability of the formwork material in
the long-term. In addition, some repair
work may also be inevitable due to the
severe working conditions. The following
points should help to keep care and
maintenance costs as low as possible.
The elements (used or new) should be
sprayed all over with the PERI Bio Clean
concrete release agent before every
use. This makes it easier and quicker
to clean the formwork. The concrete
release agent should always be sprayed
on thinly and evenly!
Spray rear side of the formlining with
water immediately after concreting.
This saves on time-consuming cleaning
operations.
The formlining of the panels must be
sprayed with the release agent immedi-
ately after striking if in continuous use.
Only then cleaning can take place with a
scraper, brush or rubber lip scraper. Im-
portant: do not clean plywood formlining
with a high-pressure cleaner as this can
lead to damage.
Care and Maintenance Instructions
Introduction
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

6
Paletten und Stapelrungen
Ausgabe 11 | 2011
Originalbetriebsanleitung
Fig. A1.01
Fig. A1.02
Instructions for Use for PERI Pallet
and Stacking Devices must be
followed at all times!
Manually-created transport units
must be correctly stacked and
secured!
Pallets and stacked items are to
be protected against the effects of
the weather, e.g. elements secured
against lifting by means of tension
belts!
Load transport
PERI pallets and stacking devices are
suitable for lifting by crane or forklift.
They can also be moved with the PERI
pallet lifting trolley.
– Always attach the 4-sling lifting gear
using the four load-bearing points.
– Only move one pallet at any one time
with the crane.
The following are just some examples.
(Fig. A1.01 - A1.02a)
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration
A1 Storage and Transportation

7
Fig. A1.02b
Fig. A1.02a
Fig. A2.01
A2 Components
Plywood formlining
For other formlining possibilities:
see PERI product range.
In the PERI design tables and slide rule,
the 3-S sheet, 21 mm, has been taken
into consideration. (Fig. A2.01)
The use of other formlining must be
statically checked.
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration
A1 Storage and Transportation

8
perm. An,End = 16 kN perm. Am,End = 13 kN
perm. An= 28 kN
perm. Mn= 7.0 kNm
perm. Am= 20 kN
perm. Mm= 4.0 kNm
Permissible internal forces and bearing forces
Permissible shear force perm. Q = 13.0 kN
Permissible bearing force in the nodes (+/- 2 cm) perm. An= 28.0 kN
Permissible bearing force between the nodes perm. Am= 20.0 kN
Permissible bending moment perm. M = 7.0 kNm
Permissible support moment (for support directly under the nodes) perm. Mn= 7.0 kNm
Permissible support moment (support between the nodes) perm. Mm= 4.0 kNm
Bending stiffness EI = 887 kNm²
End supports for single spans and
continuous girders
Supports for continuous and
cantilevered girders
GT 24 Girder
min. 16 cm min. 16 cm
lAlA
+–
–+
–+–+ –+–+
lAlA
For carrying the maximum bearing force into
the GT 24 girder, the support lengths lAmust
have the following minimum dimensions:
13.5 cm for support directly under the nodes,
14.5 cm for support between the nodes.
A2 Components
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

9
GT 24 Girder
Bearing pressure:
Reaction force perm. A = b x Leff x kcx perm. mD
b = support width
Leff = effective support length
= LA+ 2 x 3 cm, but
≤ 2 x LA
Design-typical lateral pressure coefficient for
support directly under the nodes kc,90,n = 1.45
support between the nodes kc,90,m = 1.0
Bearing pressure perm. mD= 1.24 N/mm²
Specified shear forces For the design, the shear forces (external loads)
may be reduced as follows:
In addition, the shear force
Q = Qq+ QF1 + QF2
must be verified directly over the support
The following applies for cantilever
beams: I = 2 x Ik
Qq,red = qxlx (1 – LA– 48 cm)
2 l l
e1< 60 cm: QF1,red = F1x I – e1x e1
I 60 cm
e2> 60 cm: QF2 = F2x I – e1
I
Qred = Qq,red + QF1,red +QF2
Qred ≤ perm. Q = 13 kN
Q≤ perm. Qn= 16 kN
e2
e1F1F2
q
h
LA24
I
Qq
QF1
QF2
q x I
2
F1x I – e1
I
F2x I – e2
I
A2 Components
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

10
Permissible internal forces and reaction forces:
Permissible shear force perm. Q = 11.0 kN
Permissible reaction force perm. A = 22.0 kN
Permissible bending moment perm. M = 5.0 kNm
Bending stiffness EI = 460 kNm²
End supports for single spans and
continuous girders
perm. A = 16 kN
min. 15 cm
lA
perm. A = max. perm. A = 22 kN
45 cm
lA
The projecting length of the girder must be at least
15 cm.
Depending on the projecting length of the girder
between the two values A = 16 kN and max. perm.
A = 22 kN, the permissible bearing load can be lin-
early interpolated.
For transferring the maximum reaction force into
the VT 20 girder, the support length lAmust be at
least 13.5 cm.
Specified shear forces
For the design, the shear forces (external loads)
may be reduced as follows:
In addition, the shear force Q
= Qq+ QF1 + QF2
must be verified directly over the support.
The following applies for cantilever beams:
I = 2 x Ik
Qq,red = q x l x (1 – LA– 40 cm)
2 l l
e1< 50 cm: QF1,red = F1x I – e1x e1
I 50 cm
e2> 50 cm: QF2 = F2x I – e1
I
Qred = Qq,red + QF1,red +QF2
Qred ≤ perm. Q = 11 kN
Q≤ perm. Qn= 16 kN
e2
e1F1F2
q
h
LA20
I
Qq
QF1
QF2
q x I
2
F1x I – e1
I
F2x I – e2
I
Bearing pressure:
Reaction force perm. A = b x Leff x kcx perm. mD
b = support width
Leff = effective support length
= LA+ 2 x 3 cm, but ≤ 2 x LA
Design-typical lateral pressure coefficient with kc,90,n = 1.15
Bearing pressure perm. mD= 1.24 N/mm2
A2 Components
VT 20 Girder
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

11
A2 Components
4a 4b
2a 2b
3a 3b
Slab Props
Loads from the MULTIFLEX slab
formwork must be safely transferred
into the ground.
Do not exceed the permissible
load-bearing capacities!
PERI Shoring
– Steel Tube Props PEP (4a).
– Aluminium Props MULTIPROP MP (4b).
– Shoring Towers MULTIPROP System,
PERI UP, PD 8, ST 100 (not shown).
See corresponding Assembly Instruc-
tions.
The formwork supports fit all standard
slab props with 40 mm hole diameters.
When marking out the prop, pay
attention to the required lowering
height (min. 40 mm).
Fig. A2.03
40
40
Fig. A2.01
Fig. A2.02
Formwork Support
For providing stable support for one or
two formwork girders and as intermedi-
ate support.
At the end of the girder or girder
joint.
– Crosshead 20/245 (2a) with self-lock-
ing coupling.
– Lowering head 20/24 (2b) with pin and
cotter pin.
For intermediate support
– Clawhead 245 with self-locking
coupling (3a).
– Clawhead 16/205 with self-locking
coupling (3b).
Assembly:
1. Place head on the prop.
2. Engage self-locking coupling and
check functionality.
Secure head without self-locking
coupling with pin and cotter pin.
3. Position prop.
(Fig. A2.03)
Release:
Release the self-locking coupling or
loosen pin and remove head.
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

12
Assembly aids
Universal Tripod
For slab props Ø 48 – 120 mm.
(Fig. A2.04a)
Tripod PEP Ergo
For slab props Ø 44 – 64 mm.
(Fig. A2.04b)
Through the swivel foot design, they can
also be positioned in corners or against
straight walls.
Brace Clamp
For assembling the diagonal bracing
with boards.
– For slab props Ø 48 - 76 mm.
(Fig. A2.05a)
– For slab props Ø 76 - 89 mm,
and 100 mm x 100 mm
up to 120 mm x 120 mm.
(Fig. A2.05b)
Fig. A2.04a
Fig. A2.04b
Fig. A2.05a
Fig. A2.05b
Fig. A2.06 Fig. A2.07
MULTIPROP Frame MRK
For bracing PERI MULTIPROP props.
(Fig. A2.06)
PEP Frames PRK
For bracing PERI PEP props.
(Fig. A2.07)
A2 Components
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

13
Fig. A2.09
Fig. A2.10
Fig. A2.08
Fig. A2.11
Shuttering Aids
Erection Bar
For installing and dismantling the girders.
For GT 24 and VT 20
Erection Bar GT/VT. (Fig. A2.08)
For GT 24 girders
Erection Bar 24. (Fig. A2.09)
Distance Device MF-Plus
For fitting and aligning formwork girders
with the MULTIFLEX System.
(Fig. A2.10)
Fomwork Carriage
PERI Stripping Cart ASW 465
(Fig. A2.11) or
Stripping Cart Alu.
A2 Components
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

14
Mount Crosshead or Clawhead on the prop and lock in place
(with the self-locking coupling).
Secure other types with pins and cotter pins:
As alternative to the Crosshead:
Lowering Head 20/24 for easy lowering.
Position Crosshead props on a flat, clean and sufficiently
load-bearing surface. Secure with Tripod (assembly aid).
Formwork height > 3.0 m with MULTIPROP prop
Brace props with Frame MRK as assembly aid. For further
details, see Type Test and MULTIPROP assembly instructions.
Formwork height > 3.0 m with PEP steel tube prop
Brace props with Frame MRK as assembly aid.
Alternative:
Mount diagonal bracing as assembly aid with boards and
brace clamps.
For inclined use, separate proof of stability is
required!
Horizontal loads from the shuttering procedure can only
be transferred for formwork heights up to approx. 3.0 m.
Turn the props so
that the G-hook
can be operated.
12
40 mm
2a 2b
A3 Shuttering
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

15
c
Level Crosshead props. Install main beam from below with
the Erection Bar.
The Crosshead securely supports one or two main beams
with no risk of tipping.
Cantilever: VT 20 max. 50 cm
GT 24 max. 45 cm
Do not begin concreting work on the cantilever.
Fit cross beam from below with the Erection Bar.
Adjust the cross beam so that plywood formlining joints are
always positioned on a cross beam or pair of girders.
Alternative:
Install and align cross beams with Distance Device.
Girder overlap on both sides:
VT 20 min. 15.0 cm
GT 24 min. 16.3 cm
Secure cross beam against tipping, e.g. with Flexclip
MULTIFLEX System.
Fit plywood formlining and secure with nails.
Level formwork and spray, e.g. with PERI Bio Clean.
Attention: risk of slipping!
Fall hazard!
Mount guardrails before shuttering and according to
valid regulations!
Risk of tipping!
Ensure load effects are safely transferred!
Attach intermediate props with Clawheads in prop spacings c
on the beam. Adjust lengths of props accordingly.
GT 24 girder: see A3.
The MULTIFLEX slab formwork can now be loaded. Ensure
pallets are available on the assembly area during striking.
Main beam spacing b
x · prop spacing c
min. 15 min. 15
min. 15
max. 50
min. 15 min. 15
VT 20
VT 20 VT 20
VT 20
56
34
A3 Shuttering
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration

16
Formwork Assembly
3 combinations are possible with GT 24
and VT 20 girders:
1. VT 20 / VT 20
(Fig. A3.01)
2. VT 20 / GT 24
(Fig. A3.02)
3. GT 24 / GT 24
(Fig. A3.03)
2. VT 20 / GT 24
21 mm plywood
VT 20 cross beam
GT 24 main beam
h = 46 cm
3. GT 24 / GT 24
21 mm plywood
GT 24 cross beam
GT 24 main beam
h = 50 cm
1. VT 20 / VT 20
21 mm plywood
VT 20 cross beam
VT 20 main beam
h = 42 cm
Fig. A3.01 Fig. A3.02 Fig. A3.03
42
46
50
A3 Shuttering
MULTIFLEX Girder Slab Formwork
Assembly Instructions for Standard Configuration