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HLB Loop Box

HLB Loop Box
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HLB Loop Box

Product catalog summary
Introduction
The HALFEN HLB Loop Box is a construction product designed for creating junctions between precast concrete elements. It is approved according to Eurocode 2 and carries the RAL Quality Mark, ensuring compliance with technical product requirements and quality management.
Product Specifications
The HLB Loop Box features a sturdy steel case and solid steel cover, with pre-punched nail holes for easy installation. The loops automatically pop up, saving time as no rebending is required. The product is officially approved, ensuring design reliability.
Product Range
The product range includes Single, Double, and Multi Loop Boxes, each designed for specific junction types such as constructive or load-bearing junctions. The HLB Spacer is used for creating interspaces and can be easily cut to length.
Materials
The casing is made of galvanized steel with a profiled back and pre-punched openings. The steel wire loop is high strength and galvanized.
Load Capacity
The load capacity is specified according to Eurocode 2, with detailed tables provided for different wall thicknesses and concrete classes. The product is not designed for regular tension loads, and specific crack width limitations must be observed.
Installation
Installation involves using timber battens and additional reinforcement as needed. Detailed installation dimensions and directives are provided.
Applications
The HLB Loop Box is suitable for various junction types, including butt junctions, wall-to-wall, and wall-to-column connections. The product is designed to handle transverse loads both perpendicular and parallel to the joint.
Conclusion
The HALFEN HLB Loop Box offers an economical and efficient solution for creating reliable junctions in precast concrete construction, with a focus on ease of installation and compliance with technical standards.
Load Bearing Behavior
  • Tension Loads: Managed by overlapping wire loops, with a maximum applicable tension load of 15.1 kN per loop. A safety factor of 3.0 is used, and a serviceability limit state load of 10 kN per loop is recommended.
  • Shear Loads: Transferred through a tension and compression strut model. The geometry of the joint is crucial for shear loads perpendicular to the joint, with tension loads transferred to overlapping cable loops.
Fire Protection
Adherence to fire protection regulations is emphasized, noting the steel wire strength class and the need to check breaking stresses at high temperatures. Minimum center distances for reinforcement steel and tensioning cables are specified based on fire resistance class requirements.
Installation Instructions
  • Joint Filling: The joint must be filled with HLB Mix grout, which is mixed with water and applied according to manufacturer instructions. The grout is capable of flowing without additional compaction, with a maximum grouting height of 3.5 m.
  • Reinforcement: A reinforcement bar (B 500 A, diam. 12 mm) is inserted into the joint through overlapping cable loops. U-shaped stirrups are recommended for constructive junctions.
  • Installation Tolerances: Vertical tolerance is limited to 20 mm, and welding on HLB Loop Box elements is not permitted.
Joint Grout Properties
The HLB Mix joint grout has specific properties, including a consistency capable of flowing, a maximum workability time of 90 minutes at 20°C, and resistance to frost and de-icing salt. It achieves a compression strength grade of C60/75 after 28 days.
Order Information
The document includes an order form for various HLB Loop Box components and grout, with contact details for HALFEN subsidiaries worldwide.
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Catalog excerpts

HLB Loop Box-1

with RAL Quality Mark YOUR BEST CONNECTIONS

 Open the catalog to page 1
HLB Loop Box-2

Economical solutions with HALFEN HLB Loop Box • Sturdy steel case - ensures stability when nailing to the formwork and during concreting • Solid steel cover - the HLB Loop Box element can be glued to steel formwork • Pre-punched nail holes for easy xing to the formwork • The loops pop up automatically - time saving: no rebending is required • Flexible wire loops can spring back during setting up - closing a gap can be easily carried out • Ocially approved system - guarantees reliability of the design • Ideal product dimensions, the HLB Loop Box elements are packed in standard euro-pallet dimensions...

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HLB Loop Box-3

H A L F E N H L B LO O P B OX Product over view HLB Loop Box - The Complete Range HLB D Double Loop Box → Pages 4 - 5 for load bearing junctions Multi Loop Box → Pages 6 - 11 for load bearing or constructive junctions Single Loop Box → Page 12 for constructive junctions

 Open the catalog to page 3
HLB Loop Box-4

HLB D Double Loop Box Combination of HLB D on both sides - ocially approved, approval DIBt No. Z-21.8-1870 for the junction between precast concrete elements, for transverse loads perpendicular and parallel to the joint HLB D Installation with timber batten (by contractor) D ≥ 140 mm, D ≥ 180 mm if loads perpendicular to the joint are to be taken up. Materials: Casing: Product range HALFEN HLB D Double Loop Box steel, galvanised; profiled back, with pre-punched nail holes; cover with pre-punched opening for removing after striking the formwork Steel wire loop: high strength, galvanised; steel...

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HLB Loop Box-5

H A L F E N H L B LO O P B OX Product description, load capacit y according to EC 2, application examples Minimum reinforcement, alignment Load capacity for applications according to EC 2 The official approval applies for construction elements under predominantly static loads. If imposed deformations due to e.g. temperature changes or outdoor weathering can not be excluded, the crack width of the junction has to be restricted to wk ≤ 0.3 mm. When verifying the crack width limitation, a crack width of wk = 0.1 mm is to be taken into consideration due to shear force loading parallel to the joint....

 Open the catalog to page 5
HLB Loop Box-6

Product description for the junction between precast concrete elements under transverse loads perpendicular and parallel to the joint HLB M- 20/250 in combination with HLB M-100/250 officially approved by DIBt: Installation dimensions-> Pages 16-17 Directives for installation -> Pages 16-17 Notes for the constructive load bearing behaviour -> Pages 14-15 Casing: steel, galvanised; profiled back, with pre-punched nail holes; cover with pre-punched opening for removing after striking the formwork Steel wire loop: high strength, galvanised; steel ferrule

 Open the catalog to page 6
HLB Loop Box-7

HLB M Multi Loop Box Type selection Product range HALFEN HLB M Multi Loop Box Article no. Packing unit [pieces] Item name Order example for HALFEN Loop Box: HLB M-100 / 250 Product group - Type Loop Box size Nominal spacing of the loops [mm]

 Open the catalog to page 7
HLB Loop Box-8

HLB M 50 Multi Loop Box Combination of HLB M- 50/250 on both sides - ocially approved, approval DIBt No. Z-21.8-1869 for the junction between precast concrete elements under transverse loads perpendicular and parallel to the joint Standard gap width: 20 mm Installation dimensions → Page 9 Directives for installation → Pages 16 - 17 Application examples of the combination HLB M- 50/250 + HLB M- 50/250: Butt junction wall to wall Junction wall to column Order example for HALFEN Loop Box: HLB M- 50 / 250 Wall corner junction Product group - Type Loop Box size Nominal spacing of the loops [mm] Joint...

 Open the catalog to page 8
HLB Loop Box-9

H A L F E N H L B LO O P B OX Product description, load capacit y according to EC 2, application examples Minimum reinforcement, alignment Load capacity for applications according to EC 2 The official approval applies for construction elements under predominantly static loads. If imposed deformations due to e.g. temperature changes or outdoor weathering can not be excluded, the crack width of the junction has to be restricted to wk ≤ 0.3 mm. Transverse loads do not lead to an additional crack opening. The product is not designed for regular tension loads. To include the expansion forces arising...

 Open the catalog to page 9
HLB Loop Box-10

HLB M 20 and HLB M 100 Multi Loop Box Combination of HLB M- 20/250 + HLB M-100/250 - ocially approved, approval DIBt No. Z-21.8-1871 for the junction between precast concrete elements under transverse loads perpendicular and parallel to the joint Application examples of the combination HLB M- 20/250 + HLB M-100/250: T-shaped wall junction Butt junction wall to wall Wall corner junction Standard gap width: 20 mm Installation dimensions → Page 9 Directives for installation → Pages 16 - 17 Order examples for HALFEN Loop Box: HLB M-100 / 250 HLB M- 20 / 250 Product group - Typ Loop Box size Nominal...

 Open the catalog to page 10
HLB Loop Box-11

H A L F E N H L B LO O P B OX Product description, load capacit y according to EC 2, application examples Minimum reinforcement, alignment Load capacity for applications according to EC 2 The official approval applies for construction elements under predominantly static loads. If imposed deformations due to e.g. temperature changes or outdoor weathering can not be excluded, the crack width of the junction has to be restricted to wk ≤ 0.3 mm. Transverse loads do not lead to an additional crack opening. The product is not designed for regular tension loads. To include the expansion forces arising...

 Open the catalog to page 11
HLB Loop Box-12

HLB S Single Loop Box for constructive junctions between precast concrete elements HLB S Standard gap width: 20 mm Installation dimensions → Pages 16 - 17 Directives for installation → Pages 16 - 17 Notes for the constructive load bearing behaviour → Pages 14 - 15 [ mm ] Installation with timber batten (by contractor) Materials: Casing: Steel, galvanised; proled back, with pre-punched nail holes; lid with pre-punched opening for removing after striking the formwork Steel wire loop: High strength, galvanised; steel ferrule Product range HALFEN HLB S Single Loop Box Item name Clip colour Packing...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.