A joint that makes allowance for thermal expansion of the parts joined without distortion. In building construction, an expansion joint is a mid-structure separation designed to relieve stress on building materials caused by building movement induced by:Thermal expansion and contraction caused by temperature changes,Sway caused by windSeismic eventsStatic load deflectionLive load deflectionBecause the joint bisects the entire structure, it marks a gap through all building assemblies–walls; decks; plazas or split-slab concourses; foundation floors and walls; roofs, planters, and green roofs; fire-rated demising walls and floors; interior floors; etc.  This gap must be filled to restore the waterproofing, fire proofing, sound proofing, air barrier, roof membrane, trafficable surface and other functions of the building elements it bisects.Expansion joint systems are used to bridge the gap and restore building assembly functions while accommodating expected movements.Conversely, when the temperature drops, the materials cool causing the joint gap to open.  This requires the expansion joint material to expand to follow the joint movement.

1. A joint that makes allowance for thermal expansion
of the parts joined without distortion.
EXPANSION JOINT
TREATMENT

2. In building construction, an expansion joint is a mid-structure separation designed
to relieve stress on building materials caused by building movement induced by:
Thermal expansion and contraction caused by temperature changes,
Sway caused by wind
Seismic events
Static load deflection
Live load deflection
Because the joint bisects the entire structure, it marks a gap through all building
assemblies–walls; decks; plazas or split-slab concourses; foundation floors and
walls; roofs, planters, and green roofs; fire-rated demising walls and floors; interior
floors; etc. This gap must be filled to restore the waterproofing, fire proofing,
sound proofing, air barrier, roof membrane, trafficable surface and other
functions of the building elements it bisects.
Expansion joint systems are used to bridge the gap and restore building assembly
functions while accommodating expected movements.
Conversely, when the temperature drops, the materials cool causing the joint gap
to open. This requires the expansion joint material to expand to follow the joint
movement.

3. The existing building had Expansion Joint but it was closed with a solid PCC
structure and a granite slab was placed on it and reinforcement was welded.

5. The PCC Structure, Granite Slab and the Reinforcement was removed.

6. The gap was clearly opened and cleaned.

7. Backer Rods was placed inside the gap and fixed tightly

8. Poly Sulphide was applied and air cured for 48 hours.

9. Polypropylene Ethylene Sheets was placed on the Expansion Joint and PCC
Poured next to the gap.

11. 2 Nos. JSW 0.5 MM GI Sheet was placed on either side of the joint and fastened
on single side to allow the movement.