first floor columns and second floor slab construction final cut
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First Floor Columns& Second Floor Slab
Prepared by
Elton Gallimore
Scope of Works
• Area of construction: 86.4m x 46.8m grid= 4043.52 m2.
• To construct 39 First Floor reinforced steel concrete columns at 60 x 30 cm to a height of 2.10m.
• To construct a Second Floor Slab to an area of 4043.52 m2 thickness of 250mm. Height from first floor slab 2.45m
Area of Construction (zones)
15.6m
7.2m
Area of construction (sections)
46.8m
86.4m
Section Breakdown
Safety Platform AssemblyAccess to workableAreas will be viaTemporary stairsWhich be movedAccording to Construction schedule
Week one Week two
Week Week
Zone 1 Column formwork• Sections 1-9 Column
formwork arrangement with re bar
• 3 gangs (2 men per gang), 1 gang per column
• 1 column + rebar 30mins• 12 columns = 2hrs.
Zone 2 Column formwork• Sections 10-18 Column
formwork arrangement with re bar
• 4 gangs (2 men per gang), 1 gang per column
• 1 column + rebar 30mins• 9 columns = 1.5hrs.
200kg of 10mm steel rebar per m3 of concrete (Peri requirements)
Zone 3 Column formwork• Sections 19-27 Column
formwork arrangement with re bar
• 4 gangs (2 men per gang), 1 gang per column
• 1 column + rebar 30mins• 9 columns = 1.5hrs.
Zone 4 Column formwork• Sections 30-34 Column
formwork arrangement with re bar
• 4 gangs (2 men per gang), 1 gang per column
• 1 column + rebar 30mins• 9 columns = 1.5hrs.
200kg of 10mm steel rebar per m3 of concrete (Peri requirements)
Column formwork detail
Positioned to monolithic kickers from ground floor columns
Firs
t fl
oor
Gro
und
floor
Column formwork Sequence
Column formwork assembly zone 1
Retaining wall
Column formwork assembly zone 1
Column formwork assembly zone 1
Zone 1 Ready for pour / first floor slab construction still in progress
Zone 1 & 2 Concrete pour complete
Assembly of Peri LIWA lightweight panel
Zone 1
• 4 sections of wall formwork to be
assembled
• 1 gang (2 men) per wall section
• 15 mins per m2
• 111.72 m2 approx. 1hr 45mins.
Zone 2
• 3 sections of wall formwork to be
assembled
• 1 gang (2 men) per wall section
• 15 mins per m2
• 35.28 m2 approx. 45 mins.
Zone 3
• 3 sections of wall formwork to be
assembled
• 1 gang (2 men) per wall section
• 15 mins per m2
• 35.28 m2 approx. 45 mins.
Zone 4
• sections of wall formwork to be
assembled
• 1 gang (2 men) per wall section
• 111.72 m2 approx. 1hr 45mins.
LIWA lightweight panel concrete pour
Zone 1
• 4 sections of wall to be poured;
• 2 sections of 15.6 x 0.30m @ 2.45m
height
• 2 sections of 7.2 x 0.30 @ 2.45m height
• Amount of concrete required 33.5 m3
Zone 2
• 3 sections of 7.2 x 0.30m @ 2.45 height
• Amount of concrete required 31.8 m3
Zone 3
• 3 sections of 7.2 x 0.30m
@ 2.45 height
• Amount of concrete
required 31.8 m3
Zone 4
• 4 sections of wall to be
poured;
• 2 sections of 15.6 x 0.30 @
2.45m height
• 2 sections of 7.2 x 0.30 @
2.45m height
• Amount of concrete
required 33.5 m3
2.45m
First floor slab
• 90 panels of Skydeck per section
• Panels @ 1.50 x 0.75
• 810 panels for each zone
• 1.125m2 per section
150 kg of steel rebar for every m3 of concrete (Peri requirements)
Skydeck slab formwork assembly
Beams and slab rebar
Beams integrated into slab formwork
Beam layout for each zoneSection of slab rebar
Framing and shear wall assembly
Skydeck slab formwork assembly
Zone 1 Skydeck slab panels & beam formwork assembled, ready for concrete pour
Zone 2 slab concrete pour complete
Zone’s 3 & 4 column formwork assembly and pour, Zone 3 wall assembly and pour
Repositioning of plant machinery
Zone 4 shear wall assembly and pour/ Zone 3 Slab concrete pour complete
Zone 4 slab concrete pour complete
Handover