Embed Size (px)
DESCRIPTION
Calculations of Slab Thickness and Dead Load & live load for building Calculations of Slab Thickness and Dead Load & live load for building
Citation preview
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Calculation of Slab Thickness.
Calculation of Slab Dead Load.
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Slab Thickness Calculation
Beam (rib) Kind Maximum Length (m) Minimum Thickness (cm)
Simply Supported 0.0 0 / 16 = 0
One-End Continuous 4.66 466 / 18.5 = 25.2
Two-End Continuous 3.7 370 / 21 = 17.6
Cantilever 1.77 177 / 8 = 22.1
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Take thickness of slab 26 cm
20 cm block + 6 cm topping slab
Calculation of Dead Load
Calculate the dead load of a one way ribbed slab of thickness = 23 cm
Given:
= 2.5 t/m³
= 2.4 t/m³
= 1.8 t/m³
= 2.1 t/m³
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Weight of 1 m2 of slab
2
2
2
2
2
2
m ton / 0.2625 weight Total
m ton / 0.0525 2.1025.0 tilesofWeight
m ton / 0.0525 1.2025.0 mortar ofWeight
m ton / 0.126 8.107.0 sand ofWeight
m ton / 0.0315 1.2015.0 plaster ofWeight
m / ht ton Unit Weig Thickness Layer ofWeight
: weightsmaterial Covering
Ribbed Slab Calculations
222
22
2
23
3
23
2
m ton /0.4192 /mkg 419.23 436/1.04 slab 1m ofWeight
m /1.04kg 436 160 276 m 1.04)(1 of weight Total
m /1.04kg 276 2500 0.1104 concrete ofWeight
m04.1/m 0.1104 0.16-0.2704 concrete of Volume
m 0.2704 0.261.041 slab of Volume Total
m /1.04m 0.16 0.40.250.28 block of Volume
m /1.04kg 160 028 block ofWeight
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
22
2 2
22
3
3
3
ton/m0.41920.15380.2654 slab 1m ofWeight
ton/m0.15380.25)0.02/(0.52m / blocks hollow ofWeight
ton/m0.26540.25)520.0345/(0.mconcrete/ ofWeight
ton0.03452.50.0138concrete ofWeight
m 0.01380.02-0.0338 volumeconcreteNet
m 0.020.20.250.4block hollow one of Volume
m 0.03380.260.250.52 volumeTotal
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
Weight of walls
1.5 cm
1.5 cm
Thickness of block
100 cm
100
cm
Block
Plaster
Thickness
40 cm
20
cm
20
20
20
20
20
1 m
40 cm
1 m
Design of Reinforced Concrete Structures ECIV 3016
LECTURE3: dead load calculation
Second
Term 2012
'/ 5643188'/
/ 18863125
/ 632100015.0112
/ 125105.12
2
2
2
mkgmW
mkgweightTotal
mkgplasterofWeight
mkgblocksofWeight
10BlockFor
'/ 5.75135.250'/
/ 5.250635.187
/ 632100015.0112
/ 5.187155.12
2
2
2
mkgmW
mkgweightTotal
mkgplasterofWeight
mkgblocksofWeight
15BlockFor
'/9393313'/
/31363250
/632100015.0112
/250205.12
2
2
2
mkg mW
mkg weightTotal
mkg plasterofWeight
mkg blocksofWeight
20BlockFor
Partial partition Load Calculations
For block 10 : 63 m
For block 15 : 9 m
For block 20 : 0 m
22
2
/ 221.083.988.200
3.42/
2 83.9
88.200
3.425.751956463
mtmW
mStairsArea
mAreaTotal
tonblockofWeight
block
Total Dead Load of 1 m² of Slab = 0.2625+ 0.4192 + 0.221 = 0.9027 ton /m²
