Hilti's Post Installed Reinforcement Connections Strengthening Metro Rail

The dawn of the new era has just begun for India. According to the latest estimates of the planning commission, an investment of $1 Trillion has been envisaged for the financial planning term 2012-2017. A major chunk of these funds would be diverted towards strengthening the urban transportation modules in major Tier 1 and Tier 2 cities which have a population in excess of 2 million; with live projects already on the roll in Delhi-NCR region, Kolkata, Mumbai, Chennai, Bangalore and many more to name a few.

Hilti India a 100% subsidiary of Hilti Schaan AG was established in India in the year 1997 to cater the ever increasing needs of the Infrastructure segment in India. With a strong work force of 700+ members Hilti caters to the Fastening and Demolition sector of the construction Industry with its strong service support network spread over the length and breadth of the country.

Not only have Hilti products revolutionized the construction market but have also bought a New Era of Simpler construction in the form of "POST INSTALLED REINFORCEMENT CONNECTIONS." Hilti has invested in extensive research to find solutions that allow post installed reinforcement to be used in situations where standard structural concrete detailing would require hooks or bends in concrete for any amendments required in the structure. A revolutionary new design method has now been developed on the basis of this research. According to structural concrete building codes, the bond strength of cast in bars is limited, even where depth of concrete cover is considerable. Accordingly, in some zones, such as in walls where anchorage depth is often limited, welded transverse reinforcement or hooks are used to compensate for the reduction in available anchorage depth.

The Hilti HIT Rebar Design, a method to complement the placement of Post Installed Reinforcement, also makes it possible to reduce anchorage length while maintaining the high bond strength needed to replace the hooks or welded transverse reinforcement. Research has shown that the bond strength of bars anchored with Hilti adhesive mortars is higher than that of cast in place bars, provided there is adequate concrete cover. The Hilti HIT Rebar design takes advantage of this increased bond strength in order to achieve anchorage length reductions up to 50% compared to the figures given in the building codes. The Post Installed Rebaring technology of Hilti complies with EC-2, Euro Codes.

This Technology has found its usage in the various critical applications of Metro Rail Project such as:

Diaphragm Wall Sheared Coupler Fixings

• Column Strengthening
• Beam Extensions
• Permanent Pillar Rebar Connections
• Track Rebar Connections
• Parapet Connections …..and Many More

Hilti's team of qualified engineers and technicians provide consulting, support and advise free-of-charge. The system's overall versatility gives design engineers the flexibility they need to come up with optimum solutions and specifications and this saves critical time and costs of the time bound Metro rail projects. The Hilti HIT Rebar design method coupled with POST Installed Rebaring Technology thus makes more efficient use of the products employed and optimizes overall Costs and time thus helping to stich the Metro Rail Together.