HALFEN MBT REINFORCING COUPLERS MBT 10-E CONCRETE

Transcription

1 HALFEN MBT REINFORCING COUPLERS MBT 10-E CONCRETE

2 System description Principles and advantages HALFEN MBT couplers are used to connect reinforcing bars of the same size, bars of different diameters, bars to formwork and bars when used in two phases of pouring concrete. The HALFEN MBT range of couplers provides a cost effective method of joining reinforcing bars, particularly when the fixed bar is already in place and there is insufficient space for a hydraulic swaging press. They are easy to install neither bar end preparation to form threads, nor bar rotation are required. HALFEN MBT couplers can also be used to join imperial, plain round or deformed reinforcing bars. The bar ends are supported within the coupler by two serrated saddles, and as the lockshear bolts are tightened, the conical ends embed themselves into the bar. As this happens the serrated saddles bite into both the bar and the shell of the coupler. The lockshear bolts of couplers up to and including the diameter 20 mm can be tightened using a ratchet wrench. For larger couplers a nut runner is recommended. In all cases heavy duty sockets should be used. When the pre-determined tightening torque for the bolts is reached, the heads shear off leaving the top of the installed bolt slightly proud of the coupler. This provides an instant visual check of correct installation. The system Section showing the embedment of the lockshear bolts and saddles into the bar and the shell of the coupler Lockshear bolt Reduced diameter shear plane Applications Serrated saddle Civil engineering (bridges, etc.) Foundations Refurbishment Industrial chimneys Junctions of cutted reinforcement bars Characteristics 100% of the load capacity is applicable under predominantly static load conditions as if noncutted bars were used. Ensures the full transmission of compression and tension efforts. Easy centring of the bars inside the coupler due to the central pin. Easy checking of good connection when bolt heads are sheared. Testing and approvals Full destructive tests are carried out on selected couplers from our stocks. HALFEN MBT couplers are designed and manufactured in accordance with quality system certified by EN ISO The most common sizes of HALFEN MBT couplers are approved by the BBA and are covered by the Roads and Bridges Agrement Certificate No. 98/R102. Sizes MBT10 - MBT28 have been tested and approved by the German DIBt and are covered by approval No Z In addition the coupler has been tested to show compliance with the following international design codes:- BS5400, BS8110, ACI 318 and DIN 1045 (German code). 2

3 MBT reinforcing couplers Reinforcing bar coupler L d Bar Ø [mm] Article No External Ø d [mm] Total lenght L [mm] Socket size [mm] No. of bolts Approx. weight [Kg] MBT of Ø 50mm can be manufactured on demand. For details, please contact HALFEN. Installation Place the coupler over the end of the bar to half the coupler length +/- 6mm and finger tighten the lockshear bolts onto the bar. Check the alignment and make any necessary adjustments. Place the other bar end into the coupler until it pushes up against the first bar, or against the central pin, and finger tighten the remaining lockshear bolts. Check alignment and make any adjustments. Fully tighten the lockshear bolts using either a ratchet wrench or a nut runner as appropriate. Do not use impact tools. Tighten all bolts in a random alternating pattern until all the heads of all the bolts shear off. 3

4 MBT reinforcing couplers for transition between different bar diameters Reinforcing bar coupler - transition series HALFEN MBT transition series couplers provides an effective solution for connecting bars of different diameters. Transition couplers have all of the benefits of the standard MBT. They can be installed without any preparation to the bar ends and without any need to rotate bars. The coupler can be rotated to allow access to the bolts for tightening with either a ratchet wrench or a nut runner. In all cases heavy duty sockets should be used. Transition couplers are nonstandard and are made to order d L d2 a b Bar Ø [mm] Article No External Ø d [mm] External Ø d2 [mm] Total length L [mm] Individual lengths a - b [mm] Socket size a - b [mm] No. of bolts a - b Approx. weight [Kg] 16/12 16/14 20/12 20/16 25/16 25/20 28/20 28/22 28/25 32/20 32/25 32/28 40/ Installation Place the coupler over the end of the bar to the appropriate depth +/- 6mm and finger tighten the lockshear bolts onto the bar. Check the alignment and make any necessary adjustments. Place the other bar end into the coupler until it pushes up against the first bar, or against the central pin, and finger tighten the remaining lockshear bolts. Check alignment and make any adjustments. Fully tighten the lockshear bolts using either a ratchet wrench or a nut runner as appropriate. Do not use impact tools. Tighten all bolts in a random alternating pattern until all the heads of all the bolts shear off. 4

5 MBT headed anchors for dead end embedment of bars in concrete Reinforcing couplers - Headed series HALFEN MBT headed anchors are designed to provide dead-end embedment for bars in concrete. This helps to reduce congestion and simplify the placement of rebars by removing the need for hooked ends. The anchor comprises half an MBT coupler with a plate welded to one end which carries the full tension load of the bar when it is bearing against the concrete. HALFEN MBT headed anchor also has the added advantage of requiring no special bar end preparation. t w d h L Lo Bar Ø [mm] Article No External diameter Ø d [mm] Coupler length L [mm] Total length Lo [mm] Plate thickness t [mm] Plate w x h [mm] Socket size [mm] Number of bolts Approx. weight [Kg] Minimum compressive strength of concrete 25N/mm² Electric wrench To facilitate the installation of HALFEN MBT couplers, electric wrenches are available for purchase or hire. The smooth continuous action of the wrench prevents the early shearing of the lockshear bolts and damage to threads. The wrench is supplied with specially hardened heavy duty sockets. For details please contact HALFEN. Note: Impact tools should not be used to tighten lockshear bolts. In all cases heavy duty sockets should be used. 5

6 MBT in use and applications Top of column with MBT arranged in staggered rows Column with MBT arranged in staggered rows MBT in a slab arranged in staggered rows MBT in a slab arranged in row MBT in wall arranged in row 6

7 HALFEN is represented by subsidiaries in the following 14 countries, please contact us: Austria HALFEN Gesellschaft m.b.h. Leonard-Bernstein-Str Wien Phone: office@halfen.at Internet: Fax: Belgium/Luxembourg HALFEN-FRIMEDA N.V. Borkelstraat Schoten Phone: info@halfen.be Internet: Fax: China HALFEN Construction Accessories Distribution Co.Ltd. Room 601 Tower D, Vantone Centre No.A6 Chao Yang Men Wai Street Chaoyang District Beijing P.R. China Phone: info@halfen.com Internet: Fax: Czech Republic HALFEN-DEHA s.r.o. K Vypichu 986 Komerčni zóna Rudná, hala Rudná Phone: info@halfen-deha.cz Internet: Fax: France HALFEN S.A.S. 18, rue Goubet Paris Phone: halfen@halfen.fr Internet: Fax: Germany HALFEN-DEHA Vertriebsgesellschaft mbh Katzbergstraße Langenfeld Phone: info@halfen.de Internet: Fax: Italy HALFEN-DEHA S.r.l. Soc. Unipersonale Via F.lli Bronzetti N Bergamo Phone: info@halfen.it Internet: Fax: Netherlands HALFEN b.v. Vonderweg DC Enter Phone: info@halfen.nl Internet: Fax: Norway HALFEN-FRIMEDA AS Postboks Stavanger Phone: post@halfen.no Internet: Fax: Poland HALFEN Sp. z o.o. Ul. Obornicka Poznan Phone: info@halfen.pl Internet: Fax: Spain HALFEN-DEHA S.L. c/ Fuente de la Mora 2, 2 D Madrid Phone: info@halfen.es Internet: Fax: Sweden HALFEN AB box Mölnlycke Phone: info@halfen.se Internet: Fax: Switzerland HALFEN Swiss AG Industriestrasse Dällikon Phone: mail@halfen.ch Internet: Fax: United Kingdom / Ireland HALFEN Ltd. Humphrys Road Woodside Estate Dunstable LU5 4TP Phone: info@halfen.co.uk Internet: Fax: Furthermore HALFEN is represented with sales offices and distributors worldwide. Please contact us: NOTES REGARDING THIS CATALOGUE Technical and design changes reserved. The information in this publication is based on state-of-the-art technology at the time of publication. We reserve the right to make technical and design changes at any time. Halfen GmbH shall not accept liability for the accuracy of the information in this publication or for any printing errors. The Quality Management System of Halfen GmbH is certified for the locations in Germany, Switzerland and Poland according to DIN EN ISO 9001:2000, Certificate No. QS-281 HH. 7

8 Visit our web at ISI 10 E - 03/ ex.