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

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

2 Edition 09 l 2013 PERI GmbH Formwork Scaffolding Engineering P.O. Box Weissenhorn Germany Tel. +49 (0) Fax +49 (0) info@peri.com Important Notes Without exception, all current safety regulations 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, safety and anchor details in particular cannot always be considered as conclusive or final. These are subject to the risk assessment carried out by the contractor. Safety instructions and load specifications are to be strictly observed at all times. Separate structural calculations are required for any deviations from the standard design data. The information contained herein is subject to technical changes in the interests of progress. Errors and typographical mistakes reserved.

3 Content The GT 24 Formwork Girder 2 The versatile lattice girder with a high load-bearing capacity 4 Ideal for use in wall and column formwork 8 The number one choice for use in slab formwork 10 Cost-effective use in special formwork construction 12 Components 1

4 The GT 24 Formwork Girder The versatile lattice girder with a high load-bearing capacity Formwork girders are the main component of numerous formwork solutions. In addition to the technical characteristics, the range of uses of the girder is crucial regarding their profitability. Decisive for the cost-effectiveness of a girder are not the initial investment costs but, in particular, the service life and handling costs. The GT 24 formwork girder makes a very convincing case in all of these aspects. It provides a high load-bearing capacity as well as rigidity and significant advantages in practical applications. When used in wall, column and slab formwork operations as well as in special formwork construction, material usage and the actual amount of work required can therefore be reduced with the GT 24 formwork girder. Load-bearing As lattice girder with a 24 cm overall height for heavy loads and wide spans Durable Robust design, girder nodes with mini-dovetail jointing, no trapped pockets of moisture Compatible Easy connection of site accessories through the latticework construction Mark of conformity Year of manufacture Day of production Length in cm (rounded off) Ideal for site nailing requirements due to the 6 x 8 cm thick timber chord. Strong impact protection provided by the steel end caps and side-to-side steel rivets. 2

5 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 for both wall and slab formwork. This means material and labor cost savings with every use and on every construction site. GT kg/m VT kg/m GT kn VT kn GT 24 7 knm ± 0 % Weight + 27 % Perm. bearing force + 40 % Building authority approval VT 20 5 knm GT kn/m 2 VT kn/m 2 Perm. bending moment + 93 % Bending stiffness The GT 24 lattice girder has been approved by the German Institute for Building Technology (DIBt). The struts penetrate the chords along the entire cross-section. It has practically no cavities that could trap water. Through the lattice construction, the GT 24 girder is well-ventilated when stacked. The GT 24 is extremely durable through the mini-dovetail jointing. The certificate of conformity shows that the GT 24 girder corresponds to the technical rules of DIN EN and that continuous production monitoring is guaranteed. The GT 24 formwork girder is available in lengths of up to m and can therefore be used for high walls without any joints. A girder wall formwork provides maximum flexibility whilst the number and position of the girders can be adapted to exactly match individual project requirements. Special solutions can also be cost-effectively realized with the GT 24; for example, shuttering for bridge cantilevers. 3

6 The GT 24 Formwork Girder Ideal for use in wall and column formwork The GT 24 formwork girder is a central component of the VARIO GT 24 girder wall formwork system. These project-specific 14 m high VARIO elements were designed for a fresh concrete pressure of 150 kn/m² and covered using large-sized Fin-Ply Maxi plywood formlining. Pre-assembled standard elements with 21 mm formlining are available for normal applications and have been designed for a permissible fresh concrete pressure of up to 60 kn/m². Alternatively, customized large-sized elements can be planned and assembled on the basis of the VARIO GT 24 girder wall formwork. Moving a ready-to-use VARIO GT 24 standard element complete with concreting platform and push-pull props. 4

7 By means of the Extension Splice 24, VARIO GT 24 standard elements can be extended up to a maximum of 8.00 m. The required number of extension splices depends on the height of the element. With additional overlapping girders, formwork up to m high can be assembled using standard elements. The photo shows m high wall formwork for the construction of a multi-storey car park. VARIO GT 24 standard elements are available in 60-cm height increments (2.40 m to 6.00 m) and in 4 standard widths (1.00 m to 2.50 m). These panels are simply extended for realizing greater heights. The photo shows 6.00 m high elements complete with platforms for construction of an exhibition centre. Mounting the Extension Splice 24 takes place without requiring holes to be drilled through the girder. For this grain silo, VARIO GT 24 wall formwork was adapted to exactly match the curvature. 5

8 The GT 24 Formwork Girder Ideal for use in wall and column formwork The GT 24 formwork girder is also used as the main component for the RUNDFLEX and GRV systems. With this circular formwork, sewage plants, spiral ramps for multi-storey car parks, silos and other structures with a wide range of curvatures can be realized. RUNDFLEX functions with pre-assembled standard elements which can be quickly and continuously adjusted to suit any required radius (for a wall inner radius from 1.00 m). GRV formwork is characterized by the fact that circular structures can be realized without requiring any anchors. Because with this system, the fresh concrete pressure is accommodated by means of the ring tension forces in walers on the external elements and the ring compressive forces in the walers of the internal elements m high RUNDFLEX formwork for construction of a sewage treatment plant with an internal wall radius of m. GRV creates large or small radii for closed formwork rings without any tie points. Spindles of the RUNDFLEX elements are adjusted using the Combi-Ratchet Spanner SW 24. 6

9 The GT 24 formwork girders in use with column formwork systems. For VARIO GT 24 column formwork (left), VARIO standard components as well as wedges and tie yokes are used. The high load-bearing, articulated walers of the VARIO QUATTRO column formwork allow cross-sections of up to 1.20 m x 1.20 m. PERI GRV and GT 24 formwork girders in use with conically-shaped column formwork. The VARIO QUATTRO can be moved as a complete unit using a single crane pick. Large-sized columns quickly and safely shuttered with VARIO GT 24 column formwork. 7

10 The GT 24 Formwork Girder The number one choice for use in slab formwork The MULTIFLEX girder slab formwork system is the flexibly adaptable solution for any ground plan and height. The use of the GT 24 girder allows the realization of large spans this reduces the number of individual components. The high load-bearing capacity of the GT 24 formwork girder increases the cost-effectiveness of the slab formwork; in addition, the few system components simplify all shuttering and striking procedures as well as the logistics. 8

11 a Apart from the proven slide-rule tables, a digital solution for planning the girder slab formwork is also available. With the MULTIFLEX configurator, the user can quickly and easily calculate the girder and prop spacings on a smart phone or tablet. After selecting the required girder combination along with details of the slab thickness and crossbeam spacing, the app determines the maximum permissible spacings for the main beams and props with the corresponding prop loads and maximum cantilever lengths. Alternatively, the slab formwork can be quickly and easily configured with the proven slide-rule tables. Deckenstärke d [m] Belastung q [kn/m 2 ] Zulässiger Jochträgerabstand b [m] Vorhandene Stützenlast F [kn] Querträgerabstand a [m] Deckenstärke d [m] Belastung q [kn/m 2 ] Zulässiger Jochträgerabstand b [m] Vorhandene Stützenlast F [kn] Querträgerabstand a [m] Stützenabstand c [m] Ausgabe ,60 0,90 1,20 1,50 Deckenstärke d [m] Belastung q [kn/m 2 ] Zulässiger Jochträgerabstand b [m] Vorhandene Stützenlast F [kn] Querträgerabstand a [m] Stützenabstand c [m] Deckenstärke d [m] Belastung q [kn/m ] Zulässiger Jochträgerabstand b [m] Vorhandene Stützenlast F [kn] Querträgerabstand a [m] Stützenabstand c [m] Ausgabe 2002 Stützenabstand c [m] Ausgabe ,60 Ausgabe ,90 1,20 1,50 1,80 2,10 2,40 0,60 0,90 1,20 1,50 Deckenstärke d [m] Belastung q [kn/m 2 ] Zulässiger Jochträgerabstand b [m] Vorhandene Stützenlast F [kn] Querträgerabstand a [m] Stützenabstand c [m] Deckenstärke d [m] Belastung q [kn/m ] Zulässiger Jochträgerabstand b [m] Vorhandene Stützenlast F [kn] Querträgerabstand a [m] Stützenabstand c [m] Ausgabe ,60 Ausgabe ,90 1,20 1,50 1,80 2,10 2,40 1,80 1,80 2,10 2,10 2,40 2,40 0,60 0,60 0,90 0,90 1,20 1,20 1,50 1,50 1,80 1,80 2,10 2,10 2,40 2,40 b b c b Belastung: Nach DIN 4421 Durchbiegung: Beschränkt auf l/500 a Berechnungsgrundlage ist eine Dreischichtplatte 21 mm mit E=7500 N/mm 2 (durchfeuchtet) und zulässiger B=6,5 N/mm 2 (durchfeuchtet). c a b b c c c b Belastung: Nach DIN 4421 Durchbiegung: Beschränkt auf l/500 Berechnungsgrundlage ist eine Dreischichtplatte 21 mm mit E=7500 N/mm 2 (durchfeuchtet) und zulässiger B=6,5 N/mm 2 (durchfeuchtet). Belastung: Nach DIN 4421 Durchbiegung: Beschränkt auf l/500 Jochunterstützung: Im Trägerknoten Berechnungsgrundlage ist eine Dreischichtplatte 21 mm mit E=7500 N/mm (durchfeuchtet) und zulässiger B=6,5 N/mm (durchfeuchtet). a Belastung: Nach DIN 4421 Durchbiegung: Beschränkt auf l/500 a Berechnungsgrundlage ist eine Dreischichtplatte 21 mm mit E=7500 N/mm 2 (durchfeuchtet) und zulässiger B=6,5 N/mm 2 (durchfeuchtet). c a Belastung: Nach DIN 4421 Durchbiegung: Beschränkt auf l/500 Berechnungsgrundlage ist eine Dreischichtplatte 21 mm mit E=7500 N/mm 2 (durchfeuchtet) und zulässiger B=6,5 N/mm 2 (durchfeuchtet). Belastung: Nach DIN 4421 Durchbiegung: Beschränkt auf l/500 Jochunterstützung: Im Trägerknoten Berechnungsgrundlage ist eine Dreischichtplatte 21 mm mit E=7500 N/mm (durchfeuchtet) und zulässiger B=6,5 N/mm (durchfeuchtet). Beispiel : Beispiel : Beispiel : Beispiel : MULTIFLEX GT 24 / VT 20 Vorhandene Deckenstärke Gewählte Schalhaut 3-S-Platte Gewählter Querträgerabstand Gewählter Stützenabstand Zulässiger Jochträgerabstand Vorhandene Stützenlast Beispiel : d = 0,25 m 3-S, 21 mm a = 0,50 m c = 1,20 m b = 2,70 m F= 27,2 kn MULTIFLEX VT 20 / VT 20 Vorhandene Deckenstärke Gewählte Schalhaut 3-S-Platte Gewählter Querträgerabstand Gewählter Stützenabstand Zulässiger Jochträgerabstand Vorhandene Stützenlast MULTIFLEX GT 24 / GT 24 Vorhandene Deckenstärke Gewählte Schalhaut 3-S-Platte Gewählter Querträgerabstand Gewählter Stützenabstand Zulässiger Jochträgerabstand Vorhandene Stützenlast MULTIFLEX GT 24 / VT 20 Vorhandene Deckenstärke Gewählte Schalhaut 3-S-Platte Gewählter Querträgerabstand Gewählter Stützenabstand Zulässiger Jochträgerabstand Vorhandene Stützenlast Beispiel : d = 0,25 m 3-S, 21 mm a = 0,625 m c = 1,20 m b = 2,80 m F= 28,0 kn d = 0,25 m 3-S, 21 mm a = 0,50 m c = 1,20 m b = 2,70 m F= 27,2 kn MULTIFLEX VT 20 / VT 20 Vorhandene Deckenstärke Gewählte Schalhaut 3-S-Platte Gewählter Querträgerabstand Gewählter Stützenabstand Zulässiger Jochträgerabstand Vorhandene Stützenlast MULTIFLEX GT 24 / GT 24 Vorhandene Deckenstärke Gewählte Schalhaut 3-S-Platte Gewählter Querträgerabstand Gewählter Stützenabstand Zulässiger Jochträgerabstand Vorhandene Stützenlast d = 0,25 m 3-S, 21 mm a = 0,625 m c = 1,20 m b = 2,80 m F= 28,0 kn d = 0,25 m 3-S, 21 mm a = 0,50 m c = 0,90 m b = 2,70 m F= 20,4 kn d = 0,25 m 3-S, 21 mm a = 0,50 m c = 0,90 m b = 2,70 m F= 20,4 kn A GT 24 double main beam has been used here as the longitudinal girder support in order to transfer the high loads of a beam construction. By changing the main beam direction and telescoping the cross-beams, the MULTIFLEX slab formwork can be easily adapted to suit any ground plan. GT 24 formwork girders are also used in combination with steel walers for slab edge tables. 9

12 The GT 24 Formwork Girder Cost-effective use in special formwork construction The GT 24 formwork girders can be versatilely and efficiently used also for special solutions. The use of formwork girders with steel walers and brackets allow the realization of customized solutions also for special solutions. Comparing formwork girders of 20 cm overall height to the high loadbearing capacity of the GT 24 formwork girders, the GT 24 girders result in fewer components and supports. This saves on both working time and labour costs. 10

13 For this bridge superstructure, GT 24 formwork girders carry the concreting loads into the customized sub-structure. For this steel composite bridge, the GT 24 girders transfer the loads into units consisting of SRU steel walers and SLS heavy-duty spindles. The high loadbearing capacity allows large spans with minimum deflection By means of timber formers and VARIOKIT raised formwork units, this slab table exactly matches the undulating roof construction. 11

14 GT 24 Formwork Girder Item no. Weight kg ,300 7,100 8,900 10,600 12,400 14,200 15,900 17,700 19,500 21,200 23,000 24,800 26,600 28,300 30,100 31,900 33,600 35,400 Girders 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 Universal formwork girder made of wood. L Note Construction Approvel No.Z The common lengths of the GT 24 are colourcoded to allow easy handling. Technical Data perm. Q D = 14.0 kn perm. Q Z = 13.0 kn perm. M = 7.0 knm ly = 8064 cm 4 Q D = perm. shear force Compression Strut Q Z = perm. shear force Tension Strut L

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16 The optimal System for every Project and every Requirement Wall Formwork Column Formwork Slab Formwork Climbing Systems Tunnel Formwork Bridge Formwork Shoring Systems Construction Scaffold Facade Scaffold Industrial Scaffold DE en ma PERI GmbH Access Protection Scaffold System-Independent Accessories Services PERI GmbH Formwork Scaffolding Engineering P.O. Box Weissenhorn Germany Tel. +49 (0) Fax +49 (0) info@peri.com