Services
Re-strengthening of old and damaged structures
The firm reports completing re-strengthening projects over the last 30 years. The work starts with finding out what the structure can actually carry.
The procedure
- Test the concrete by hammer test or core cutting.
- Check the condition and placing of steel in existing members with a scanner.
- Analyse the structural behaviour in view of the test results.
- Revise the design calculations and drawings, allowing for applied load, live load and frame behaviour.
- Re-strengthen the structure using the methods below.
- Check the structure after repair by applying the specified extra load.
Methods used
- Demolishing dangerous portions with extra support in place
- Column jacketing
- Additional beams
- RCC walls where required
- Protecting slabs from rain
- Protecting the structure from sewerage leakage
- Repairing minor cracks with chemicals
- Rectifying major cracks according to the failure condition
- Studying and protecting against foundation settlement
- Re-strengthening foundations
Cases
Work the firm reports completing
Adnan Corner
F.B. Area, Karachi
Some columns and foundations of an existing G+1 structure were removed and replaced. The firm reports the building has stood safely for 25 years and is in residential use as G+4.
Popular Juice factory
A slab deflected under excess loading. Columns were jacketed and intermediate beams added.
Mid Asia Grammar School
North Karachi
Rain water seepage had deflected a slab. The drainage was revised, the roof waterproofed and the slab rectified under the firm's supervision.
Flats, North Karachi
North Karachi
A chajja projection had settled along the front of the flats. It was redesigned and re-strengthened under full supervision, in coordination with the SBCA.
Iqbal Plaza
North Karachi
Sewerage seepage had damaged the steel and concrete of ground-floor columns. Old cast-iron pipes were replaced with PVC and the columns were jacketed.
G+4 building, Lyari
Lyari, Karachi
Seepage from a nala caused foundation settlement. The seepage was stopped and the foundation re-strengthened, in coordination with the SBCA.
Rajes Textile factory
Korangi, Karachi
Soil settlement affected the back of the factory. Columns were jacketed, the foundation re-strengthened and new columns added.
D.P-5 factory, North Karachi
North Karachi
Machine impact was making the factory building vibrate. RCC walls and internal beams were added under the firm's consultancy.
Structure strength testing, O&M R-13 building, K-Electric
Dual Fuel site, Karachi
A 2007 consultancy agreement with KESC, now K-Electric, for structure strength testing, design and drawings for the O&M R-13 building at the Dual Fuel site.
On site
Site photographs
Site photographs from the firm's work.