MULTIFLEX
The flexible girder slab formwork for all groundplans and slab thicknesses up to 1.00 m
Product Brochure – Issue 08/2018

Content

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System advantages of the
MULTIFLEXThe flexible girder slab
formwork for every ground planand slab thicknesses up to
1.00 m
Optimized use of materials
For all ground plans
For all surface requirements
Design example of
MULTIFLEX Slab Formwork

Issue 08/2018

Publisher
PERI AG
Formwork Scaffolding Engineering
Rudolf-Diesel-Straße 1989264 Weissenhorn
Germany
Phone +49 (0)7309.950-0
Fax +49 (0)7309.951-0
info@peri.com
www.peri.com

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System overview
MULTIFLEX at a glanceStandard applications
Load transfer with MULTIFLEX
Detailed solutions forstopend formwork
Detailed solutions for beams

System supplements
17 Fast and safe working with		MULTIFLEXProject examples
20 The MULTIFLEX Girder
		 Slab Formwork in use

Important notes
Without exception, all relevant safety regulations
and guidelines must be observed at all times inthose countries where our products are used.
The photos shown in this brochure feature construction sites in progress. For this reason, safety
and anchor details in particular cannot always
be considered as conclusive or final. These aresubject to the risk assessment carried out by thecontractor.
In addition, computer graphics are used which are
to be understood as system representations. For
ensuring a better understanding, these and thedetailed illustrations shown have been partiallyreduced to certain aspects. The safety installations which have possibly not been shown inthese detailed descriptions must nevertheless beavailable. The systems or items shown might not
be available in every country.
Safety instructions and load specifications are to
be strictly observed at all times. Changes anddeviations always require separate static proof.
The information contained herein is subject totechnical changes in the interests of progress.
Errors and typographical mistakes reserved.

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Peace Coliseum, Overstock.com Corporate Campus,
Salt Lake City, UT, USA

System advantages

MULTIFLEXThe flexible girder slab formwork for all groundplans and slab thicknesses up to 1.00 m
With MULTIFLEX, every slab thickness, any ground plan and all floor
heights can be formed. Main components of the MULTIFLEX are the
VT 20K or GT 24 Formwork Girders.
The possible combinations of these
formwork girders ensure the highest
level of flexibility for adapting toproject-specific requirements.
Main and cross beams, their positionand spacing, as well as formlining alongwith the shoring are freely selectable.
As a result, MULTIFLEX Slab Formwork
can be ideally adapted to suit every
ground plan and all loads. If the highOptimized use of materials
through any combination of
GT 24 and VT 20K Formwork
Girders as well as a freely­selectable girder arrangementload-bearing GT 24 Formwork Girders
are used, large spans for the main andcross beams can be realized.
The overlapping of the slab girders andvariable positioning of the main beams
ensure maximum flexibility. MULTIFLEX
is therefore the ideal solution for simple
and complicated ground plans, slabs
with offset outer edges or integrated
downstanding beams, as well as forming operations in confined spaces.

UP Flex modular scaffolding is used
as shoring. For this, lowering heads,
cross heads and claws heads are available which can be combined with the
PERI shoring.

Depending on the load and height of
the room, PERI steel tube or aluminium slab props, shoring towers or PERI

For all ground plans
through the variable positioningof the girders – also polygonally,
trapezoidal or overlapping

For all surface requirements
easily adaptable with freely­selectable formlining according
to the required quality of the slab
underside3

System advantages

Optimized use of materials
Any combination of formwork girders
and freely selectable girder arrangement
The formwork girders as well as therespective spacings are selected­according to project-specific requirements. Thus, MULTIFLEX stands forcost-effective working operations forevery ground plan.
The slab formwork can be realized withdifferent combinations of main andcross beams. Depending on the spanand loads, the VT 20K Formwork Girder,
the high load-bearing GT 24 or a combination of both are used.
The VT 20K Solid Web Girder is thecost-effective solution for smaller slab
thicknesses. The girder with a 20 cm
overall height was specially developed
for slab formwork operations.
The GT 24 Formwork Girder with a
24 cm overall height offers considerably more load-bearing capacity andhigher bending stiffness. As a result,larger spans for example are possible.
This reduces material usage as well
as workload.

For applications with the GT 24, fewer girders,steel waling or slab props are required. This results in savings in both material and labour costs.

The use of the load-bearing GT 24 Girder as a double main beam in connection with PERI UP Rosett
Flex shoring, facilitates the transfer of heavy loads
over great heights.

Technical data (see Design Tables)
GT 24 as main beam and cross beam: slab thicknesses up to 1.00 m
VT 20 as main beam and cross beam: slab thicknesses up to 1.00 m■ GT 24 as double main beams and GT 24 as cross beam: slab thicknesses up to 1.00 m■ VT 20 as double main beam and VT 20 as cross beam: slab thicknesses up to 1.00 m■■

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System advantages

VT 20KThe cost-effective solid web girder

GT 24
The versatile lattice girder with ahigh load-bearing capacity

The girder with a 20 cm overall height was speciallydeveloped for slab formwork operations. It can beused as a cross and main beam.

The girder nodes with mini-dovetail jointing ensures
the stability of the GT24 Formwork Girder through aspecial node design in the timber chord.

The PERI VT 20K is the economical, 20 cm high solid web girder. Robust steel caps on the ends of thechords along with the concave web end provide thegirder with reliable protection against damage. The
8 cm wide chords also provide sufficient width for plywood joints.

Through the lattice construction and 24 cm overall
height, the GT 24 Formwork Girder provides a highload-bearing capacity and rigidity. Due to the sturdy
design and girder nodes with mini-dovetail jointing,the formwork girder is extremely robust. The design
simplifies the assembly of accessories.

Universal solid web girder made of woodwith a 20 cm overall height■ 11 lengths from 1.45 m to 5.90 m■ Weight: 5.30 kg / m (production weight)■ Permissible bearing force: 11.00 kN■ Permissible bending moment: 5.00 kNm■ Bending stiffness: EI = 460 kNm²■■

Universal formwork girder made of woodwith a 24 cm overall height■ 18 lengths from 0.90 m to 6.00 m
in 30 cm increments, extra-long up to 17.85 m
on request■ Weight: 5.90 kg / m■ Permissible bearing force: 28.00 kN■ Permissible bending moment 7.0 kNm■ Bending stiffness: EI = 887 kNm²

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System advantages

For all ground plans
Variable positioning of the girders – also polygonally,
trapezoidal or overlapping
Through the possibility of changing
the main beam direction, the variable alignment and the overlappingof the girders allows the MULTIFLEX
to be easily adapted to accommodate a broad range of ground plans.
Due to the fact that the position, alignment and the spacing of the main andcross beams can be freely selected,
MULTIFLEX Slab Formwork can also
be adapted to suit complicated groundplans. In addition, circular slab areas canbe formed with MULTIFLEX whereby
the girders are simply arranged radially.

6System advantages

For all surface requirements
Freely selectable formlining in accordance with the required
quality of the slab soffit
MULTIFLEX can be used with any
type of formlining. Depending on
the requirements regarding frequency of use and the slab soffit in particular, formlining sheets of various
qualities and dimensions can beinstalled on the formwork girders.
Depending on the required quality ofthe slab soffit, the most appropriate
formlining can always be used which
also takes the corresponding joint arrangement into consideration. Throughproject-related customized formlining
sheets and special sizes, filler areas
can be completely closed.

For this underground roundabout, MULTIFLEX formed an even intermediate platform which covered
the entire area. As formlining, 3-Ply plywood with 0.50 m widths was used. With this formliner, theconcrete finish features a wood texture.

Examples taken from the PERI plywood panel portfolio■ PERI FinPly | PERI FinPly Maxi | PERI RusPly

Coated plywood for very high specifications and demanding concretesurfaces; made of cross-bonded birch veneers with reinforced phenolic
resin on both sides■ PERI Spruce
Coated plywood for a smooth concrete finish with a slightly textured
surface; 7-veneer construction made of Nordic softwood, with phenolic
resin on both sides■ 3-Ply Plywood
Large sheets of plywood for concrete surfaces with high specifications
and a concrete finish with a slight timber structure■ PERI FinNaPly
Shuttering plywood for concrete surfaces with a timber structure

PER release agent
PERI release agent is a fluid, chemical-physical concrete release agent for allcommercially available formwork and construction equipment.
■ PERI Clean and PERI Bio Clean

used for absorbant as well as non-absorbant formlining sheets(e.g. boards, coated large-sized plywood sheets, steel)■ PERI Plasto Clean
is biodegradable in accordance with OECD Guideline 301c; PERI Plasto
has been specially developed for formlining with plastic surfaces

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System advantages

Design example of MULTIFLEX Slab Formwork
Optimized use of individual components

With the PERI Design Tables,
MULTIFLEX Slab Formwork is
quickly and easily planned.
The possible cross beam spacing isdetermined via the slab thickness
while taking into account the formlining (3-Ply plywood, 21 mm). The
pre-selection of the permissible prop
spacing, possible main beam spacing
and actual prop load allows the user
to optimally plan and use MULTIFLEX– depending on the available girder
lengths, prop load-bearing capacityand geometry of the building.

a

b

c

With the MULTIFLEX configurator,
the user can quickly and easily
optimize the girder/prop spacings
as well as the props.
Underlying standard
The load assumption is calculated according to DIN EN 12812-2008-12 witha bulk density of the fresh concrete of
ɣ= 24.5 kN / m3 (g = 9.81m / s2).
Functional description (web app)
Firstly, the user selects the required assembly version whereby 5 girder combinations are possible. After entering the clear room height, slab thickness andcross beam spacing, the MULTIFLEX configurator determines the maximum
possible main beam spacing.
After selecting and entering the main beam spacing, the app determines the
maximum prop spacing. Using the given clear room height and prop spacing,the cantilever length, resulting prop load and a list of all possible prop types
along with their corresponding permissible prop loads are determined. The
permissible prop load is determined for the selected prop type. As a result,the utilization rate of the cross beam/main beam are additionally shown.
The PDF output format for the documentation, direct printing or sending
via e-mail is provided by the application. The customer's building specifications
are integrated via a note in this data sheet.

8System advantages

Design example with Table VT 20 / VT 20
Slab thickness		Clear room height
Main and cross beam
Plywood formlining				d = 20 cm
h = 2.80 m
VT 20
21 mm,
62.5 x 250 cm

1. Cross beam spacing a(formlining support)
The cross beam spacing is determined depending on theslab thickness and the size of formwork used or type of
formlining.
Selected cross beam spacing a = 62.5 cm

a = 62.5 cm

2. Main girder spacing b(cross beam support)
According to the Design Tables, the max. permissible
span for the cross beam is 2.05 m. A main beam spacingof 2.00 m is selected (depending on the room
geometry).
Selected main beam spacing b = 2.00 m

a = 62.5 cm

a = 62.5 cm

b = 2.05 m

3. Prop spacing c(main beam support)
Selected prop spacing c = 1.50 m

50 cm

h

4. Prop load Fv(Determining the load to be accommodated)
In accordance with the PERI Design Tables, the load
is 22 kN with a main beam spacing of 2.00 m. Throughthe selected smaller main beam spacing of b = 2.00 m,
this results in the following reduced prop load:
Fv = 22 kN x (2.00 m / 2.05 m) = 21.5 kN.
Subsequently, a PERI slab prop (PEP; MULTIPROP) is
selected which corresponds to the extension length hwith permissible prop load = 21.5 kN.
Prop load Fv to be accommodated = 21.5 kN

c = 1.50 m

c = 1.50 m

c = 1.50 m

9System overview

MULTIFLEX at a glance

10System overview

The graphic representationshows the execution with GT 24
Formwork Girders as main andcross beams. Alternatively,
VT 20K Formwork Girders canbe used, or a combination of both
girders. For high loads, assemblies
with 2 parallel beams arranged
as double main beams are also
possible.
GT 24 as main beam andcross beam
Slab thicknesses up to 1.00 m
VT 20 as main beam andcross beam
Slab thicknesses up to 1.00 m
2 x GT 24 as main beams
1 x GT 24 as cross beam
Slab thicknesses up to 1.00 m
2 x VT 20 as main beams
1 x VT 20 as cross beam
Slab thicknesses up to 1.00 m

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Standard applications

Load transfer with MULTIFLEX

Formwork support, slab props and shoring
Loads from the MULTIFLEX Slab Formwork must be safely transferred
into the ground. For this, various PERI props and shoring possibilities canbe used. System components required for supporting the slab formwork
are available for all systems.

Formwork support
For providing stable and tilt-proof
support for one or two formwork
girders and as intermediate support,
a range of heads is available.
On the girder ends as well as girder
joints, the Crosshead 20/24S with
self-locking coupling or Lowering
Head 20/24 with bolt and cotter
pin can be used. For intermediate
support, the Clawhead 24S or Clawhead 16/20S is utilized – both complete with self-locking couplings.

Lowering Head 20/24
For rigid and tilt-resistant support of one or two GT 24 or VT 20 girders,with a lowering range of 4 cm.

Crossheads 20/24, galv.
Crosshead 20/24 S, galv.
Crosshead 20/24, galv.
With or without self-locking couplings for stable support of one or two
GT 24 or VT 20 girders.
Clawheads 24, galv.
Clawhead 24 S, galv.
Clawhead 24 L, galv.
With or without self-locking couplings for positioning intermediate props
on GT 24 girders without nailing
Clawheads 16/20, galv.
Clawhead 16/20 S, galv.
Clawhead 16/20, galv.
With or without self-locking couplings for positioning intermediate props
on VT 20 girders without nailing

PEP Ergo Slab PropsPEP Ergo props fully comply with
Load Class B, D and E of EN 1065.
The maximum load-bearing capacity
is 50 kN. Thereby, the transfer ofloads is also possible when using
double main beams even for standard applications with GT 24 Formwork Girders. Hot-dip galvanizationof all surfaces ensures a long service
life. The low weight whilst maintaining a high load-bearing capacity
makes it extremely cost-­effective.

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PEP Ergo Steel Slab
Props are availble
in the following
lengths:
1.50 m, 2.50 m,
3.00 m, 3.50 m,
4.00 m and 5.00 m.

Standard applications

MULTIPROP Slab Props
MULTIPROP props are made ofaluminium and therefore relatively
lightweight, e.g. the MP 350 withan extended length of up to
3.50 m only weighs 19.40 kg. The
props are type tested and carry
up to 90 kN - this means they aresuitable for accommodating highloads and, due to their length, ideal
for larger room heights.

MULTIPROP props are type tested. Available inlengths of 1.20 m, 2.50 m, 3.50 m, 4.80 m and6,25 m.

The Universal Tripod is used as an erection aid.
Horizontal loads have to be transferred throughthe formwork to the structure.

MULTIPROP Shoring Towers
The MULTIPROP props are supplemented with frames and can also be
used as shoring tower. For erectionof a tower, MULTIPROP frames aremounted using the captive wedge.
Fastening is possible to both theouter and inner tubes. Ingeniously
designed details ensure a longservice life.

Shoring systems
For larger room heights, ST 100
Stacking Tower or PERI UP Flex
Modular Scaffolding provide the­ideal support for the MULTIFLEX.

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Standard applications

Detailed solutions for stopend formwork

Stopend formwork
Stopend Angle AW
The PERI Stopend Angle AW - thesolution for slab edge stopends up
to 40 cm thick and max. 60 cm thickbeams.
The stopend angle can be nailed onwooden girders or directly on theformlining. The direction of the predrilled nail holes thus ensures the
maximum load-bearing capacity. Nailholes allow fixing in any direction, on
the girder in the longitudinal direction
as well as on the formlining traversely
to the girder.

Stopend angles made of plastic
The plastic version of the slab
stopend angle has a lower load-bearing capacity but, with a weight ofless than 500 g, is significantly lighter than a conventional metal angle.
It can be combined with VT 20 and
GT 24 girders and is suitable for setting of stopends on slab edges aswell as the forming of beams up to
max. 50 cm thick.

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Standard applications

Guardrail Post HSGP
Guardrail height = 1.05 m

max. 45 cm

max.
30 cm

Formwork Bracket-2
For slab cantilevers up to 45 cm witha maximum 30 cm slab thickness.
Cantilevers can be adjusted exactly
as required by means of the quick
jack nut.

Stopend Sleeve
DW 15

max.
50 cm

Slab Stopend Bar 105
For shuttering of slabs up to 50 cm
thick flush with the wall. The SlabStopend Bar 105 is aligned parallel to the external wall surface bymeans of the adjustable spindle.

max. 14 cm

15Standard applications

Detailed solutions for beams

Beams
Beam Formwork UZ
The PERI UZ Beam System is thesolution for large beam cross-­
sections. With the Beam Bracket
UZ 40 and Perforated Rail UZ, beamheights of up to 80 cm are possible
without any ties. For larger heights,
one additional tie is necessary at the
top. The Perforated Rail UZ connects
both beam brackets very tightly.

Max. beam widths with form
width b = 10 cm
1 x UZ Perforated Rail 80 = 45 cm
2 x UZ Perforated Rails 80 = 135 cm
1 x UZ Perforated Rail 129 = 95 cm

Wall Clamps
Smaller beams can likewise be shuttered with PERI Wall Clamps 55, 75
or 105. Especially practical are thefriction-locked fine adjustments with
the quick jack nut without wedges
along with the self-cleaning, robust
square thread on the arm.

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System supplements

Fast and safe working with MULTIFLEX

Tilt prevention with Flexclip
The Flexclip combines cross andmain beams and ensures a tilt-proof
connection of the girder without
nailing. The clip is available in three
versions for all girder combinations:■ GT 24 / GT 24■ GT 24 / VT 20■ VT 20 / VT 20

Spacing gauge and fixing tool
MULTIFLEX is formed from the­assembly area. The fixing tool –supplemented by the spacing gauge– thereby simplifies the mountingof the cross beams; because thepre-adjusted girder spacing on thespacing gauge makes time-consuming measuring of cross beam spacings unnecessary. Using the same
fixing tool, the flexclips are alsosafely mounted from the ground.

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System supplements

Fast and safe working with MULTIFLEX

Guardrails
Guardrail Holder GT 24 / VT 20
with Guardrail Post HSGP-2 serve
for mounting anti-fall protection on
GT 24 and VT 20 girders.
Maximum post spacing is■ 1.20 m with Side Mesh Barrier
PMB 130■ 2.10 with guardrail boards■ 2.40 m with Side Mesh Barrier
PMB 260

Guardrails on casting segments
The Stopend Angle AW or plastic stopend angle canbe used in combination with the Guardrail Post AW for
anti-fall protection on casting segments.

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System supplements

Guardrails on building edges
The open edge of the building issecured with PERI Slab Tables. In
the process, guardrails for the slabedge tables are pre-assembled on
the ground.

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Project examples

The MULTIFLEX Girder Slab Formwork in use

ADAC Headquarters, Munich,­Germany
The ADAC has a new headquarters in
Munich. The impressive building complex consists of a five-storey, undulating
curved base construction with a large
courtyard. Above this is an office towerwith 18 floors and rounded corners.

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The floor slabs of the base construction
were formed with modular and customi­
sed tables as well as the MULTIFLEX
Girder Slab Formwork. The standard­table modules could be used for forming
the 1.23 m thick reinforced concreteslab in the basement, strengthened byadditional VT 20 Formwork Girders and
PEP Steel Tube Slab Props.

Project examples

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Project examples

The MULTIFLEX Girder Slab Formwork in use

The 30 cm thick reinforced concrete slab was formed with MULTIFLEX.

Complete solution from one source: wall and slab formwork as well as theshoring and reinforcement scaffolding were optimally adapted to match the
project requirements.

Ocean Plaza Business Centre,
Kiev, Ukraine

CIMC Silvergreen Trailer Plant,
Günzburg, Germany

The four-storey "Ocean Plaza" is a modern business centre
with a total of 250,000 m² of floor space and 3,000 underground parking spaces in downtown Kiev.

For the construction of a new semi-trailer production facility,
PERI engineers optimally adapted their formwork solution
for the walls and slabs as well as the scaffolding used as
shoring, access technology and reinforcement work in orderto match project requirements. An important element of the
PERI comprehensive solution was the shoring concept for
the realization of the cantilevered floor slabs of the administration building along with the in-situ slab construction of
the almost 100 m long presentation platform on the northside of the production hall. Here, PERI UP was used for theexact assembly of the prefabricated beams including support
at the third points. The scaffolding was then supplemented
with the 10 m high load-bearing system – as a sub-structure
for the MULTIFLEX Slab Formwork as well as all subsequent
work operations with MAXIMO Panel Formwork for constructing the 5 m high architectural concrete wall.

The 30 cm thick reinforced concrete slabs were formed
using MULTIFLEX with support provided for the standard 3
m floor heights using PEP 20 and MULTIPROP Slab Props.
In those areas where loads had to be transferred over greatheights, the MULTIPROP Aluminium Props were connectedwith MRK Frames thus forming a modular shoring towersystem.

Due to the metric system grid of the PERI UP Flex, thestandards in the spatial supporting structure could be adjusted
in 25 or 50 cm increments to ­exactly match all load requirements. Very high load concentrations could be transferredjust as easily as low surface area loads. With the help ofgraduated system steel decking in the same grid, maximum
adaptation of the intermediate platforms could also be realized thus resulting in complete coverage.)22

Project examples

MULTIFLEX served for the construction of the cast-in-place beams with the
PEP Props connected by means of PRK Frames to form shoring towers.

With PERI UP Rosett and MULTIFLEX, the high loads from the massive structural elements at heights of between 10 m and 12 m werereliably transferred into the ground.

Pérez Art Museum,
Miami, USA

Albian Sands,
Fort McMurray, Canada

The Pérez Art Museum is located directly on Biscayne Bay
in Miami. The 3-storey building complex is positioned on a
protruding base and is dominated by a boldly projecting cantilevered roof construction.

For the construction of a production plant, massive foundations and rectangular columns along with enormous reinforced concrete beams with heights of 4 m were required.
The use of self-compacting concrete resulted in high concrete pressures.

MULTIFLEX Girder Slab Formwork was used for constructing the large-scale beam structure in an architectural concrete design.

PERI UP Shoring and MULTIFLEX Slab Formwork used forconstructing the massive beams impressively proved theirhigh degree of flexibility. Through the planning and supply of
formwork and scaffolding from one source, it was possible
to perfectly match the MULTIFLEX Slab Formwork and PERIUP Shoring. Both systems complemented each other ideallyso that also during the concreting of massive structural elements at large heights, over 40 kN per leg could be safely
transferred.

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Wall Formwork

Column Formwork

Slab Formwork

Climbing Systems

Bridge Formwork

Tunnel Formwork

Shoring Systems

Construction Scaffold

Facade Scaffold

Industrial Scaffold

AccessProtection Scaffold

Safety Systems

System-Independent­Accessories

Services

PERI AG
Formwork Scaffolding Engineering
Rudolf-Diesel-Strasse 1989264 Weissenhorn
Germany
Tel. +49 (0)7309.950-0
Fax +49 (0)7309.951-0
info@peri.com
www.peri.com

INT en 08 | 2021 0.5eb 790423 © PERI AG

The optimal Systemfor every Project andevery Requirement