CPCCBC4010B: Retail Complex Load Analysis and Foundation Adequacy

This assignment focuses on the load analysis and foundation adequacy of a retail complex, based on provided architectural and structural drawings. It begins by calculating various loads, including live, wind, roof sheeting, rafter, column, and footing loads, to determine the total load on the column pad footing. The assignment then assesses the sufficiency of the footing size against the structural requirements, considering the soil bearing capacity and applying relevant clauses from IS 456. Calculations are performed to determine the required base area and thickness of the footing. Finally, the assignment outlines a step-by-step process for evaluating existing buildings, including documentation review, site inspection, execution analysis, deficiency identification, and mitigation strategies, referencing NCC Volume One for assessment methods and compliance.

Qa) Measure the roof area.
From the plan drawing A-04
135.4 metres x 40.0 metres = 5416 m2
Calculate the live and wind loads
5416 * 1.7 = 9207.20 kN
Calculate roof sheeting
17.5 * 5416 * 9.81 * 1/1000 = 929.78 kN
Calculate Rafter.
Take a rafter 610UB weighs 125kg/m therefore 135.4 m * 125kg/m = 16925 kg * 9.81 * 1/1000
= 166.03 kN
Calculate Column.
From the drawing S-05
Column is 321 x 309 UC that weighs 137 kg/m therefore 40 * 137 * 9.81 *1/1000 = 53.76 kN
Calculate footing.
From the drawing S-05
Footing is 0.8 x .8 x 0.8 = .512m3 x 2400kg/m3 = 1228.8 x 9.81 = 12054.53 divide by 1000 =
12.05 kN
Total load on the column pad footing at Grid D2 = 9207.20 + 929.78 + 166.03 + 53.76 + 12.05 =
10368.82 kN
Qb) The footing size is not sufficient to meet the structural requirement

Qc) Assume soil bearing capacity of 300 kN/m2
The transfer of the axial load at the base of the column
Bearing resistance should be greater than the total factored load Pu
Bearing stress [ cl.34.4 IS 456]
σ = 0.45*fck * (A1/A2)1/2
Where, (A1/A2)1/2 ≤ 2.0
A1 = A2 = 0.4 * 0.4 = 0.16 m2
Pbr = bearing force = 0.45 * fck * A1
= 0.45 * 20 * 0.16 *10-3 = 1440 kN < 15553.23 kN
The transfer of the load is not possible in absence of of any reinforcement
Assume a back fill soil is 15% of Pu
Base area required = 400 *1.15 = 1.533 m2
Length = width = 1238 mm
Take,
Length = width = 1250 mm
What has been provided = 0.8 * 0.8 = 0.64 m2
Therefore take 1.533 m2
The bearing pressure = 10368.82∗1.15
1.533 = 7778.31 kN/m2
Thickness of the footing
tan α ≤ 0.9[(100*qa/fck) + 1]1/2
≤ 0.9[100(7.77831/20) + 1]1/2
≤5.992
h = [*800 – 400)/2][tan α] = 1198.4 mm

Therefore, provide
1250 mm * 1250 mm * 1200 mm
Qd)
Step 1 – Find related documentation The reason for Step 1 is to find any documentation
that may give data identifying with the first plan, endorsement and development of the working,
and additionally any resulting options and changes.
Step 2 – Embrace an inspection of the site. The reason for Step 2 is to recognize and
record the design and also features of the construction of the building that identify with current
Performance Requirements. When one involves in himself or herself to work on the existing
building, in which the reason (use) of the building is proposed to be changed, or significantly ,
addition of or modifications' are to be undertaken, it will be important to report design and
development attributes identifying with Performance Requirements that would apply to the
proposed action.
Step 3 – Analyze expected execution. The reason for Step 3 is to think about the
execution of the current building with the significant Performance Requirements. based on step
2, it will be important to survey whether the level of execution of existing attributes conforms to
the particular Performance Requirements.
Step 4 – Recognize real insufficiencies The reason for Step 4 is to survey whether a
potential insufficiency distinguished in Step 3 is a real inadequacy. The Assessment Methods
depicted in A0.5 of NCC Volume One may help with deciding if a potential insufficiency is a
real deficiency
Step 5 – Alleviate real inadequacies The reason for Step 5 is to build up a proposed
extent of updating work that reduces actual deficiencies recognized by means of Step 4. At the
point when a choice is made under Step 4 that a specific building characteristic does not agree to
the significant Performance Requirements, it is suitable that the actual inadequacy be tended to
as per Part A0 of NCC Volume One.