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17 IITGN-UL/Façade 18 IITGN-UL/Façade

4. Construction b. Deck slab
Deck slab at all floor levels is provided with 1mm thick trapezoidal steel decking Image 4 shows the placement of
a. Steel frame sheet and composite action is achieved by fasteners in form of SDS screws of size thereinforcement wires on the deck
Structural frame consists of Indian standard steel sections for beams and 18×25 mm at a spacing of 300 mm center to center through deck sheet onto the sheet for achieving composite action.
columns. ISMB 600 members used for columns whereas ISMB 400 members are beams. The slab was cast using M-25 (1:1:2) design mix concrete (Figure 9) with OPC
used as beam sections. Beam column joints are connected with connector plates to provide a maximum floor thickness of 127 mm. This incorporates an anti-cracking

through flexible end plate connections. These connections consist of a single mesh consisting of 8 mm Fe 500 diameter wires at 230 mm center to center.
plate fillet welded to the end of the beam and site bolted to either a supporting
column or beam. Image 2 shows the steel structural frame comprising of beams
and columns. Inset of Image 2 shows flexible end plate connection with three

bolts fixed to the web of beam sections.

Image 4: Placement of reinforcement wires
on the deck sheet

Figure 9: Cross sectional view of deck slab

Image 2: Steel structural frame comprising test facility Image 3: Column base plate fixed with
pedestal using HSFG M-30 foundation bolts

For analysis, these connections were considered as simple supports due to the
absence of continuity of beams across the connections. 8 steel columns are fixed
to concrete pedestals at base level through High Strength Friction Grip (HSFG)
M-30 foundation bolts with 20mm thick column base plate. Each ISMB 600

column section is fixed through base plate with 10 foundation bolts.