DESIGN OF TWOWAY SLABSLAB NO = STAIR CANTILEVER SLABGRADE OF CONCRETE 20 MPaGRADE OF REINFORCEMENT 415 MPaLONGER SPAN IN METERS "a" = 4.730 mSHORTER SPAN IN METERS "b" = 4.115 mASSUMED THICKNESS OF SLAB = 150 mmASSUMED DIA. OF MAIN REINF. = 10 mmASSUMED DIA OF DIST. REINF = 10 mmCLEAR COVER TO REINFORCEMENT = 25 mm

LIVE LOAD = 3

FLOOR FINISH = 1

STEPS = 1.9

PARTITIONS = 1

DEAD LOAD = 0.15 x 25 = 3.75

TOTAL FACTORED LOAD = 15.975

a = 4.730b =

4.115

kN/m2

kN/m2

kN/m2

kN/m2

kN/m2

kN/m2

DESIGN OF TWOWAY SLAB

DESIGN OF TWOWAY SLABSLAB NO = STAIR CANTILEVER SLABGRADE OF CONCRETE 20 MPaGRADE OF REINFORCEMENT 415 MPaLONGER SPAN IN METERS "a" = 4.730 mSHORTER SPAN IN METERS "b" = 4.115 mASSUMED THICKNESS OF SLAB = 150 mmLy/Lx = 1.149

LIVE LOAD = 3

FLOOR FINISH = 1

STEPS = 1.9

PARTITIONS = 1

DEAD LOAD = 3.75

TOTAL FACTORED LOAD = 15.975EFF.DEPTH ALONG SHORT SPAN = 120 mmEFF.DEPTH ALONG LONG SPAN = 110 mm

BENDING MOMENT Mu pt Ast Dia of Rein

Mx(-ve) = 0.0250 x 15.975 x 4.730 2 6.763 0.470 0.134 160.57 10

Mx(+ve) = 0.0250 x 15.975 x 4.730 2 6.763 0.470 0.134 160.57 10

Mx(-ve) = 0.0250 x 15.975 x 4.730 2 6.763 0.559 0.160 176.16 10

Mx(-ve) = 0.0250 x 15.975 x 4.730 2 6.763 0.559 0.160 192.18 10

My(+ve) = 0.0250 x 15.975 x 4.730 2 6.763 0.559 0.160 176.16 10

check:

Deflection at mid span =

0.0027

D = 7.5E+09Deflection at mid span = 1.929591 mm < L/325 O.K.

(L/325 = 14.5538 mm)

O.K.NOT O.K.

kN/m2

kN/m2

kN/m3

kN/m2

kN/m2

kN/m2

Mu/bd2

a1 x q a4/D

a1 =

Eh3/(12(1-g))

DESIGN OF TWOWAY SLAB

Spacing Spacing(p)

489

489 200

446

408

446 225