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Performance based design explicitly evaluate how a building is likely to perform given the potential hazard it is likely to experience , considering uncertainties inherent in the quantification of potential hazard and uncertainties in assessment of t
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first attemp of plinth calculation
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Multi Unit Residential
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Analysis of Wind Loads on Buildings and SignsFull description
Estimates MATERIALS REQUIREMENTS REQUIREMENTS IN RESIDENTIAL BUILDINGS BASED ON PLINTH AREA BASIS Material
Single Storey
Double Storey
Bricks (100 Nos.) Cement (Tonnes) Steel (Kg)
2.26 A+66.8 0.153A+0.57 21.3A-314
2.15A+63 0.145A+0.54 21.97A- 305
Sand (m3)
0.47A-7
0.43A-5.6
Coarse aggregate (m 3) ( i) 20 mm & down (ii) 40 mm & down
0.363A-0.76 0.176A-0.21
0.145A+1.5
Timber (m3) ( i) Frames & shutters ( i i) Shuttering Lime (quintal) Surkhi (m3) Bitumen (Kg) Glass Panes(m 2) Primer for oil paint (litre) Oil Paint (litre)
Four Storey (R.C.C. Framed) 2.56A-0.0096A 2-26.2 0.2024A-0.364 102.46A-0.401A 21662 397A-0.38
Note:1. The above above expressio expression n is applicable applicable for for plinth plinth area ranges ranges from from 30 to 300m 300m2(one floor) 2. In case of single single and and double double storeyed storeyed framed framed buildi buildings, ngs, and and up to 100m 100m2 (one floor) for four storeyed framed building. 3. The above above table gives gives material material for one floor floor / storey. storey. Multiply Multiply the the No. of Storeys Storeys to get total total Quantity.
Rough Estimate (m 3 / m2) (Based on plinth area basis) 1.
Earth work:
300 Class loading Single bay Two bay 0.1 + (22.2 nD/q) 0.1 +( 18.9 nD/q) Where n = No. of floors D = Depth in meters q = SBC in KN/m2
500 class loading Single bay Two bay 0.1 +( 24.8 nD/q) 0.1 +( 21.5 nD/q)
2.Brick work for foundation and basement : Q = m3 / m2 Span 4.0 m 5.0 m 6.0 m 7.0 m
Single bay 0.17 0.16 0.14 0.13
Two bay 0.14 0.13 0.12 0.11
3.Brick wall for superstructure: Load bearing = 0.40 to 0.45 m 3 / m2
4.DPC : Framed structure Load bearing
5.Centering:
= =
0.1 m 2 / m2 0.23 m 2 / m2
m2 / m2
Grade beam= 0.35 < 0.40 < 0.45 m 2 / m2 Slab, beam etc Span Single bay Two bay 4.0 m 1.57 1.49 5.0 m 1.51 1.45 6.0 m 1.47 1.42
RCC for isolated footing
6.
RCC / m2 = Total quantity =
X for LL X A 0 where A0 = Cumulative ultimate floor area in m 2
3.0 KN/m
2
5.0 KN/m
2
SBC in KN/m2
Single bay
Two bay
Single bay
Two bay
50
0.216
0.188
0.245
0.215
75
0.137
0.119
0.155
0.137
100
0.089
0.077
0.100
0.088
120
0.071
0.062
0.080
0.071
150
0.055
0.048
0.062
0.055
200
0.041
0.036
0.046
0.041
220
0.035
0.0305
0.040
0.0354
250
0.030
0.026
0.0335
0.030
300
0.026
0.023
0.029
0.026
400
0.016
0.014
0.0185
0.0165
RCC for grade beam:
7.
2
Quantity / m = y Single bay = 0.05 Two bay = 0.04 Total requirement = y A g where Ag = area of G.F .
8. RCC for superstructure: RCC quantity = z for LL 2 RCC/Floor = z Af where Af = Area of floor in m Quantity = z for LL Description RCC floor
2
2
3.0 KN/m Single bay Two bay 3
2
0.21 m / m
3
5.0 KN/m Single bay Two bay 2
0.19 m / m
3
2
0.22 m per m
3
2
0.20 m per m
Note: 1. 2. a. b. c. d. e. f.
This is inclusive of staircase and discontinuous sunshade but exclusive of items (2) below. Include the following, if present: For slab thickness > 100 mm add extra quantity per m2 over 0.1m 3 For floor systems with primary and secondary beams add + 0.02 m3 / m2 For canopy in G.F, add 0.01 m3 / m2 For drops up to 1.20 m, add 0.01 m3 / m2 For Continuous sunshade of 0.60 to 0.75 m alround the building, add 0.15 m3 / m2 For sun- breakers up to 0.6 m, add 0.01 m3 / m2
Steel for slab, beam & column (item wise) 2
Live load 3 KN/m Single bay Two bay
Description
i. Slab ii. Beams iii. Columns iv. Staircase,sunshade etc. a. Qty / m3 with primary beams b. Qty with primary and secondary beams Steel required for columns reinforcement / m 3 with primary beam 400 300 225 with secondary beam 400 300 200
2
5 KN/m Single bay Two bay
0.100 0.065 0.045 0.010
0.100 0.055 0.035 0.010
0.10 0.07 0.05 0.01
0.10 0.06 0.04 0.01
45 41 37
38 35 32
48 43 39
42 38 35
50 46 42
43 40 37
53 48 44
47 43 40
9. Plastering in CM 1:5 – 12 mm thick: 2.3 to 2.6 m 2 / m2 of plinth area
10.
Finishing the RCC :: 2.4 m2 / m2
(10mm thick)
11. White washing: 4.7 to 5.0 m 2 / m2
12.
Wood scantling:
Doors D Windows W Ventilators V
= = =
0.018 m 3 / m2 of shutter area 0.019 m 3 to 0.025 / m 2 of shutter area 0.02 m 3 / m2 of shutter area
Based on thumb rule Wood required for door Wood required for glazed window with ventilator
= 1 {Door area in m 2 } 10 2 = 1 {window area in m 2} 12 2
Steel requirement / m 2 on Plinth area basis S.No. 1 2
Type of Building
Load bearing
Framed structure
Residential Buildings
25 to 30 Kg
35 to 40 Kg
Public Buildings
30 to 35 Kg
40 to 50 Kg
Foundation & Basement Framed Structure (GF+ 3 Floors) S.No.
Type of Building
Steel Qty. in Kg / m 2
1
Residential Flats (Multi storey )
5 Kg / m2
Office Building 2
3
4 Kg / m2 6..5 Kg / m 2
(a) Load Bearing (b) Framed Commercial Buildings such as Bus Stand, Restaurants etc.
7.5 Kg / m 2
Approximate Quantity of steel requirement (General) S.No. 1 2
3
Description Footings Cast in situ Piles
Qty. of Steel in Kg / m 3 50 to 65 30 to 50
Plinth Beam
4
Lintel
5
Column
6
Beam
7
Slab
8
Stairs
Estimation of Quantity of Reinforcement
70 to 100
100 to 130 100 to 200 150 to 200 60 to 75 90 to 120
For rough calculation of reinforcement steel in construction Projects following thumb rule may be adopted: (i)
Slab
80 Kg / m 3
(ii) Beam
110 Kg / m 3
(iii) Column
160 Kg / m 3
(iv) Footing slab
80 Kg / m 3
MATERIAL REQUIRED ON PLINTH AREA BASIS FOR SINGLE STOREY LOAD BEARING RESIDENTIAL BUILDING
Component Brick Cement Steel bars
Material required 500 Nos. /m 2 1.5 Bags /m 2 12 kg/m 2 (MS bars) 8 kg/m2 ( Tor steel)
CEMENT Cement requirement / m 2 on Plinth area basis S.No. 1 2 3 4 5
Type of Building Residential buildings Public buildings Residential Flats ( Multi storey) Office building Commercial buildings such as Bus Stand, Restaurants etc.
Load bearing 5 to 6 Bags 4 to 5 Bags ---2.4 to 3.0 Bags -----
Framed Structure 5 to 7 Bags 6 to 8 Bags 3.2 to 4.0 Bags 5 Bags 4.5 Bags
For Foundation & Basement of Framed Structure (up to 4 Storeyed ) alone
S.No. 1 2 3
Type of Building Residential Flats Office building Commercial building
Load bearing ---0.36 Bags / m 2 ----
Framed Structure 0.4 Bags / m 2 0.5 Bags / m 2 0.45 Bags / m 2
Minimum Cement content required for various Grade of Concrete S.No.
1 2 (i) 3 (i) 4 5 (i) (ii) 6
Grade of Concrete
Cement content in Kg / m3 of concrete As per As per TCE (old IS 456 code) M15 285 --M20 300 M20 (below G.L) 360 M20 (above G.L) 315 M25 300 M25 (for Piles) 400 M25 (for other structures) 365 M30 415 320 M35 340 M35 (for Piles) 525 M35 (for other structures) 475 M40 535 360
Max. W/c ratio
0.55
0.50
0.45 0.45
0.40
Note:As per IS 456 – 2000 Maximum cement content should not exceed 450 Kg / m for the cement mortar to ensure that heat of hydration and shrinkage cracking are prevented.
3
COST OF BUILDING (GENERAL) 1. Cost of foundation & Plinth (Up to G.L. 13% From G.L. to Plinth & DPC 5%) 2. Cost of Brick work from Plinth to Roof 3. Cost of RCC works except roofing 4. Cost of flooring ( RCC roof 15% Lime terracing 5%)
18%
23% 6% 20%
5. Cost of Flooring 6. Cost of Doors & Windows 7. Cost of Plastering & finishing
6% 20% 7%
Note: The cost excludes Water supply, Sanitary & Electrification.
COST OF MATERIALS & LABOUR FOR BUILDING WORK Materials Brick Sand C.A. Cement Timber in scantling Steel Total Overall
% 16 4 4.5 19 9.5 23.5 76.5
Labour Mason Carpenter Mazdoor
23.5 100%
SINGLE STOREY COST Component Plinth Superstructure Flooring Roofing (Flat) Wood work Miscellaneous Total
% 8 3.5 12
% 18 27 8 20 17 10 100
ORDINARY BUILDINGS Materials Cement Steel Timber Other Materials Total
% 13 10 12 25 60
Labour Excavation Masons Carpenter Black smith Total
