TOS REPORTM

1. PT SLAB SITE VISIT
Sub: tos v
Class : T.Y.Barch
Guided by: Ar. Sagar Gunwani Sir
Department of architecture MIT SambhajiNagar

2. Introduction to site:
An assignment was given to us to visit a
construction site and write a report. Following
were its objectives.
OBJECTIVES:
 To get an understanding about pt slab.
 To gain knowledge about construction
techniques.
BUILDING SITE:
The building we chose for visiting was a mall being
constructed. The site was divided in 3 parts – saffron
landmark, saffron landscape ,saffron tranquil. We have
visited 1st part i.e saffron landmark.
Name: Saffron Landmark
Type of building: 2B+G+12
Location: saffron landmarks. Gut no 57/P, Beed bypass Rd,
Aurangabad, Maharashtra.
Architect: Kailash Patil Sir
Reasons for choosing this site: The main reason for
choosing the site for observation and understanding about
pt slab.
Date of visit: 26/07/2023
Total Site area: 27,834 sq.m.
86.77M

3. PT SLAB OBSERVATIONS
• Post tension slab is a
combination of conventional
slab reinforcement and
additional high-strength
steel tendons, which are
subjected to tension after
the concrete has set. This
gives the slab more strength
and increases the load
carrying capacity of the slab .
• The Red bands painted
indicate that the tendons are
running just above the red
markings. This is to ensure
that no drilling is done in this
zone for fixing electrical or
other fixtures .

4. GENERAL OBSERVATIONS
• As we entered into the building, we saw there was red
marking on the slab. It indicates the tendons. The red
marking was done for fixing electrical or other
fixtures.
• We observed that there were concrete blocks used
instead of bricks walls. This was done because they
absorb less water than bricks thus reducing dampness
in the walls. They are also economically more feasible.
• On the top floor of the construction site, we observed
a huge duck provided in the centre. It was for north
light and ventilation. It was to be covered with a
translucent sheet.
• We also saw sunk slabs being provided for toilet
blocks. It was filled with water. Its depth provided is
usually 200mm or 300mm below normal floor level. It
is a kind of slab coasred to prevent water leakages in
the underground pipes. It was filled with water to
check the water leakage. The use of having a sunken
slab is to conceal all the pipes below the floor.
• The building had two basements, when we visited
basement we saw that columns in the basement were
huge and 30% more in volume as compared to the
columns. The load on the column decreases as the
building moves up.

5. GENERAL OBSERVATIONS
• We saw that in the construction of column, a 3 to 4
inch (75 mm to 100 mm) starter is casted before the
main column is casted. It provides base support to
the form work which is needed to be fixed. It is also
easier to establish and verify the centre line of the
starter then that of the column.
• Also, a cover of 50 mm is usually left from the sides
while construction of columns. It is done to protect
the reinforcement from corrosion and other
potential damage.
• There were small ducts provided, these were
provided for the electric wires and toilet block pipes.
• Also ,the toilets were given one above the other on
each floor. It is usually done to achieve the constant
floor to floor height and it makes drainage system
easier to install and less costly.
• This green coloured pipes are the tendons. Green
colour rubber part is known sleeve. It is pulled from
the sides with the help of anchorage machine.
• We also saw connectors provided at the top of the
reinforcement bars for the attachment of the next
reinforcement bar.
• The lift which was to be provided in the building was
of octagonal shape.