GT 24 Formwork Girder
The versatile lattice girder with a highload-bearing capacity
Product Brochure – Issue 04/2018

Content2Product advantages
The GT 24 Formwork Girder:
a versatile lattice girder with ahigh load-bearing capacity

481012Issue 04 | 2018

Publisher
PERI GmbHFormwork Scaffolding Engineering
Rudolf-Diesel-Strasse 1989264 Weissenhorn
Germany
info @peri.com
www.peri.com

Application examples
The GT 24 for use in wall andcolumn formwork
The GT 24 for use in slab formwork
The GT 24 for use with climbing solutions and civil engineering structures
The GT 24 for use with special
formwork and project-specificsolutions

16Components
GT 24 Formwork Girder

Important notes
All current safety regulations and guidelines must
be observed in those countries where our products are used.
The photos shown in this brochure feature construction sites in progress. For this reason, safetyand anchor details in particular cannot always beconsidered as conclusive or final. These are subject to the risk assessment carried out by the contractor.
In addition, computer graphics are used which areto be understood as system representations. For
ensuring a better understanding, these and thedetailed illustrations shown have been partiallyr­ educed to show 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. Separate structural calculations are required for any deviations fromthe standard design data.
The information contained herein is subject totechnical changes in the interests of progress.
­Errors and typographical mistakes reserved.

1Product advantages

The GT 24 Formwork Girder
The versatile lattice girder with a high load-bearing capacity

The GT 24 Formwork Girder provides a high load-bearing capacity
and rigidity. Through the use of thegirder for wall, column, slab or special formwork, consequently bothmaterial quantities and workloads
can be reduced.
The cost-effectiveness of the GT 24Formwork Girder is a result, in particular, of the long service life and reduced
handling costs. The formwork girder
provides a high load-bearing capacityand exceptional bending rigidity whichbring decisive advantages in practicalapplications.

Compared to other 20 cm high formwork girders, the higher load-bearing
capacity of the GT 24 results in fewer
girders, steel walers or slab props foruse in both wall and slab formwork.
This means material and labour costsavings – with every use and on every
construction site. Likewise, this applies
to applications for more complex formwork operations, e.g. for infrastructure
projects or special solutions.

GT 24 5.9 kg/m

±9%

VT 20 5.3 kg/m

Weight (production weight)

GT 24 28 kN+ 27 %VT 20 22 kN

perm. bearing reaction

GT 24 7 kNm+ 40 %VT 20 5 kNm

perm. bending moment

GT 24 887 kNm2

+ 93 %VT 20 460 kNm2

Bending rigidity

A specific comparison confirms that the GT 24
Lattice Girder has a much higher load-bearing
capacity and bending rigidity than the VT 20
Girder Formwork at the same weight.

Girder description
Mark of conformity
Year of manufacture
Day in year when
girder was glued

GT 24EN 13377
L 24 M
BWU02

15-007

Made inGermany

Girder length360

The 24 cm high formwork girder is available instandard lengths from 0.90 m to 6.00 m in 30 cm
increments with extra-long lengths up to 17.85 m
on request. The girder is classified in Girder Class
L 24 according to EN 13377:2002 (D).

Future viability as well as ecological and economic sustainability have a highpriority for all PERI business activities. Procurement therefore takes place inaccordance with ecological sustainability; The timber processed at PERI, forexample, is predominantly sourced from certified growing regions.

2

Product advantages

Particularly high load-bearing
capacitywith a 24 cm overall height andlattice construction for heavyloads and wide spans

Long-lasting durability
through its robust design andgirder nodes with mini-dovetailjointing

The Certificate of Conformity confirms that theGT 24 Girder corresponds to the technical rules ofDIN EN 13377.

The girder nodes with mini-dovetail jointing guarantee the durability of the GT 24 Lattice Girder.
The struts penetrate the chords along the wholecross-section and there are practically no cavities
which could collect and hold moisture.

Practice-oriented
through its proven design whichsimplifies the connection of site
accessories

3

Application examples

The GT 24 Formwork Girder
Strong and cost-effective for use in wall andcolumn formwork
The GT 24 Formwork Girder is a central component of the proven VARIOGT 24 girder wall formwork system.
Pre-assembled standard elements with21 mm formlining are available for normal applications and have been designed for a permissible fresh concretepressure of up to 60 kN/m². Alternatively, customized and optimized largesized elements can be planned and assembled on the basis of the VARIOGT 24 Girder Wall Formwork.
Particularly high elements can also becreated with the extension splice. Likewise, special requirements regarding
anchor and joint arrangements – for example, in architectural concrete projects – are easy and simple to realize
using the girder wall formwork.

Standard elements can be extended up to a maximum of 8.00 m by means of the Extension Splice
24; larger heights are possible using additional
overlap girders. The Extension Splice is connected
through the lattice work without having to drill thegirders.

4For this structure, up to 14 m high walls in architectural concrete quality were constructed withVARIO GT 24 Girder Wall Formwork. The use ofself-compacting concrete and the large concretingheights made it necessary to configure the wall
formwork to handle a concrete pressure of120 kN/m².

For a sewage treatment plant, the straight wall
sections were safely and quickly constructed with
the VARIO GT 24 system. All formwork elements
were equipped with complete platform systems.

These project-specific 14 m high VARIO elements were designed for a fresh concretepressure of 150 kN/m² and covered usinglarge-sized Fin-Ply Maxi plywood formlining.

5Application examples

The GT 24 Formwork Girder
Strong and cost-effective for use in wall andcolumn formwork
The GT 24 Formwork Girder is also
used as the main component for theRUNDFLEX and GRV systems. With
this circular formwork, sewage treatment plants, spiral ramps for multi-storey car parks, silos and otherstructures with a wide range of curvatures can be realized.
RUNDFLEX functions with pre-assembled standard elements which can bequickly and continuously adjusted tosuit any required radius (for a wall inner
radius from 1.00 m).
GRV Circular Formwork, on the otherhand, is characterised by the fact thatcircular structures can be realized without requiring any anchors. Becausewith this system, the fresh concretepressure is accommodated by meansof the ring tension forces in the walersof the external elements and the ring
compressive forces in the walers of
the internal elements.

3.60 m high RUNDFLEX formwork for construction of a sewage treatment plant with aninternal wall radius of over 13.50 m.

6

The self-cleaning adjusting spindles of the­RUNDFLEX formwork are easily adjusted to suit
the required curvature by means of a ratchet­spanner.

GRV is the circular formwork solution withoutties and can be used for all radii. By means of
the articulated connections of the GRV walers,
small radii of 0.90 m can also be formed.

Application examples

Column formwork is to be designed
to accommodate relatively highfresh concrete pressures as comparatively small cross-sections are concreted quickly. The GT 24 Formwork
Girder with its high load-bearing capacity is used in various column
formwork systems.
The VARIO GT 24 Column Formwork isalways a project-specific solution consisting of formwork girders, steel walers and selected formlining. It can beadapted to suit every cross-section,
concreting height and required fresh
concrete pressure. Architectural concrete requirements can also be optimally fulfilled with VARIO GT 24.
VARIO standard components and articulated walers as well as tie sets areused for the VARIO QUATTRO. Theformwork can be moved as a complete
unit in one crane lift and provides
high-quality concrete finishes withsharp or chamfered edges.

For VARIO GT 24 Column Formwork, VARIO standard components as well as wedges and tie yokes
are used. As a result, large-sized columns can beformed.

The VARIO QUATTRO Column Formwork canbe moved as a complete unit by crane. The
high load-bearing, articulated walers allow
cross-sections of up to 1.20 m x 1.20 m.

7

Application examples

GT 24 Formwork Girder
Strong and cost-effective for use in slab formwork

The MULTIFLEX girder slab formwork system is the flexibly adaptable solution for any ground planand height. In the process, the useof the GT 24 Lattice Girder allows
large spans and thus reduces thenumber of individual components
required. The GT 24 is also the rightsolution for slab tables or special
solutions for transferring horizontalloads.

The high load-bearing capacity of theGT 24 Formwork Girder increases thecost-effectiveness of the slab formwork; in addition, the few system components simplify all shuttering andstriking procedures as well as thelogistics.

With MULTIFLEX, every slab thickness, any
ground plan and all floor heights can be formed.
Thereby, the GT 24 allows large spans which thus
reduces the number of components to be moved.

Specifically planned formwork solutions are requiredin the case of more complex shapes, such as curved
slab surfaces. Here, the advantages of the GT 24
Girder come to the fore.

8Application examples

The MULTIFLEX Slab Formwork - configured withGT 24 Formwork Girders – supports the formwork
for a "network" of architectural concrete balconies
which later supports a prefabricated slab.

Slab tables with GT 24 Girders and steel walers
can be planned and assembled according to specific geometries. The units can be quickly moved
with the help of a transportation fork.

In particular, for large slab thicknesses and highloads, slab tables are configured with the highload-bearing GT 24 Formwork Girders.

The MULTIFLEX App
Formwork girders and slab props
or shoring can be used in a wide
range of combinations with­MULTIFLEX Slab Formwork. With
the MULTIFLEX configurator, theuser can quickly and easily optimize the girder/prop spacings aswell as the props.

The MULTIFLEX configurator determines the maximum possible main
beam spacing according to the required girder combination and taking
into consideration the clear roomheight, slab thickness and cross beamspacing. After entering the selectedmain beam as well as prop spacing,
the tool proposes possible prop types
together with the respective permissible prop loads.

As a result, the app also very clearlyshows the utilization rates of thecross beams/main beams andprops.
Through the selection of different
girder combinations, main beam andprop spacings, the app can quickly
and easily determine the optimally-utilized configuration of the­MULTIFLEX.

Optimization
Material and time savings

Input:
configuration
parameters

Output:quality-assuredresult

9Application examples

GT 24 Formwork Girder
Strong and cost-effective for use with climbing solutions andcivil engineering structuresGT 24 Formwork Girders are frequently used for climbing systems –with crane-movable platforms aswell as hydraulically operated
self-climbing systems.
Climbing systems are used for the construction of vertical as well as inclined
structural elements at great heights,
e.g. high-rise building walls, bridgepiers and dams. In addition to simple
scaffold platforms, there are other different climbing systems whereby
brackets, platforms and formwork areconnected to form securely mounted
and movable units. Thereby, the GT 24Formwork Girder is used very frequently for vertical formwork as well as forthe execution of working platforms andplatforms.

The VARIO GT 24 Girder Wall Formwork incombination with the RCS Rail Climbing System for the construction of elevator and stairwell shafts.

10RCS and CB Climbing Formwork, together with
the VARIO GT 24, formed the ideal climbing combination for constructing the two bridge pylons.

Due to the oblique-angled building corners,
project-specific corner platforms were used
here; load-bearing GT 24 Formwork Girders
provided the support for the decking.

Application examples

In tunnel and bridge construction,
almost exclusively one-offs are realized. For project-specific formwork
solutions, the GT 24 Formwork Girder is used in numerous positions toprovide load-bearing support for theformlining or as a sub-structure forworking platforms.
In the case of infrastructure projects,
high loads in particular must be transferred and individual formwork solutions have to be planned and adapted.
Here, the advantages of the GT 24Formwork Girder with a particularlyhigh load-bearing capacity come to thefore.

Heavy-duty shoring supports obliquely arranged VARIO GT 24 Girder Formwork. The result is a huge inclined pier for a new motorway
bridge.

The contruction of the superstructure formwork
and falsework for this foreland bridges is based on
the flexible VARIOKIT and PERI UP modular construction systems. GT 24 Formwork Girders form
the sub-structure for the formlining.

For applications in tunnel construction, theGT 24 Formwork Girder allows the realizationof particularly high load-bearing tunnel formwork carriages.

11Application examples

GT 24 Formwork Girder
Strong and cost-effective for use with special formwork andproject-specific solutions
For the construction of complex, multi-curved reinforcedconcrete components, PERI provides customized freeform formwork. Based on a 3D building model, the formwork units from PERI are individually planned and assembled. On site, the formwork units can subsequently
be easily assembled following a similar process to thatof a system formwork.

With freeform formwork, the highest architectural demands
on geometries and surfaces can be realized. Such one-off
pieces are extremely cost-effective due to a high proportionof standard elements taken from the PERI portfolio. In theprocess, the statically load-bearing elements are based onVARIO GT 24 Girder Wall Formwork. After use and dismantling, the system components can be used for other applications.

The Galileo Satellite Control Centre in Oberpfaffenhofen
near Munich is an extraordinary architectural concrete
structure: the hall is dominated by three inclined reinforced concrete towers over 9 m high. PERI planned anddelivered the formwork units according to schedule andin the best quality. On site, a maximum of precision forming and an excellent surface finish was achieved.

12© Hufton + Crow

Application examples© Hufton + Crow

The Aquatics Centre is characterized
by its bold designs and extraordinary architectural concrete quality.
The water sport facility was constructed for the 2012 Summer
Olympic Games. For this, PERI
planned, produced and delivered
more than 200 customized formwork units realized using a 3D design which could then be exactly positioned and assembled together on
the construction site. All formliningthat came into contact with the concrete was taped so that maximumarchitectural concrete quality could
be achieved. No rivet and screw impressions are visible on the finalconcrete surfaces.

13

Application examples© Bernard Miranda Lessa

GT 24 Formwork Girder
Strong and cost-effective for use with special formwork andproject-specific solutions

The extraordinary Museum of­Tomorrow was constructed in Riode Janeiro. A customized formwork
and scaffolding solution with 3,500
project-specific special formwork elements ensured that this structure
was realized within the specified
time-frame and on budget.

14The assembly plans and data provided
the basis for the dimensionally accurate
CNC-controlled cutting of the formwork
units and final assembly of the elements– for which approx. 60,000 m² of chipboard were processed.

Application examples

Services provided by PERI formwork assembly■■ Customized panel cutting■■ Production and delivery of reveals,

box-outs according to individualrequirements (shape, formlining
and on-site material requirements).
■■ Factory-made preparation of complete formwork elements matchedto suit the structural requirements
and individual construction planning.
■■ Supervisor available on-site withthe aim of qualifying personnel inthe handling of PERI products inorder to increase efficiency andsafety levels.
■■ Dismantling of formwork elements used at a fixed price: toreduce the workload of site personnel and reduce crane requirements and storage space.

15GT 24 Formwork Girder
Item no. Weight kg
075100075120075150075180075210075240075270075300075330075360075390075420075450075480075510075540075570075600  5.300  7.100  8.900
10.60012.40014.20015.90017.70019.50021.20023.00024.80026.60028.30030.10031.90033.60035.400Girders GT 24
Girder GT 24, l = 0.90 m
Girder GT 24, l = 1.20 m
Girder GT 24, l = 1.50 m
Girder GT 24, l = 1.80 m
Girder GT 24, l = 2.10 m
Girder GT 24, l = 2.40 m
Girder GT 24, l = 2.70 m
Girder GT 24, l = 3.00 m
Girder GT 24, l = 3.30 m
Girder GT 24, l = 3.60 m
Girder GT 24, l = 3.90 m
Girder GT 24, l = 4.20 m
Girder GT 24, l = 4.50 m
Girder GT 24, l = 4.80 m
Girder GT 24, l = 5.10 m
Girder GT 24, l = 5.40 m
Girder GT 24, l = 5.70 m
Girder GT 24, l = 6.00 m

L			
918			
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L31129660
28801624012060

163296

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PERI GmbH
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

DE en 04 | 2018 3ma 790584 © PERI GmbHThe optimal Systemfor every Project andevery Requirement