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Design Criteria

3 mm PVC Floor Tiles

20 mm Cemeent Screed

12.5 mm Lime-Plaster Ceiling FInish

1 Hour Fire Resistance

Fcu 30 MPa * :

Consider spans in both directions

Long Span \[REGION[a9b55a0f26f840b2bbe55c22501ae661]]\

Ly 6 m * :

Short Span \[REGION[c7fb188a2bd7426d9d0adab573f6a87a]]\

Lx 3.5 m * :

Load Assumptions

Live load

qk 3 kN m 2^/ * :

SANS 10160 - 2 Table 1 - Category B1 - Imposed Load for Office areas for General use

Density Concrete

ρc 24 kN m 3^/ * :

SANS 10160 - 2 Table A.1

Density Cement Screed

ρs 24 kN m 3^/ * :

SANS 10160 - 2 Table A.3

Density PVC Floor Tiles

ρt 16 kN m 3^/ * :

SANS 10160 - 2 Table A.3

Density Lime Plaster

ρl 17 kN m 3^/ * :

SANS 10160 - 2 Table A.1 assumed to be Gypsum, use 23 if cement and sand

Span / Depth Ratio = 16 for simple supported beam as per SANS 0100 - 1 Table 10

How does the correction factor work M/bd^2 Table 11

Minimum Cover for fire Resistance = 15mm

350016 / 218.75

Min Slab thickness for fire resistatnce = 100mm

h 0.25 m * :

Dead Load Concrete

DLc h ρc * : 6000 kg * m s 2^* /

Dead Load Screed

DLs 0.02 m * ρs * : 480 kg * m s 2^* /

Dead Load PVC Floor Tiles

DLt 0.003 m * ρt * : 48 kg * m s 2^* /

Dead Load Lime - Plaster

DLl 0.0125 m * ρl * : 425 kg * 2 m * s 2^* /

Total Dead Load

Dn DLc DLs + DLt + DLl + : 6740.5 Pa *

Ln qk : 3000 Pa *

ULS = Ultimate Limit State

n 1.2 Dn * (1.6 Ln * (+ : 12888.6 Pa *

Ly Lx / 1.714

Ly Lx / 3 ≤

Therefore 2 Way Slab

asx 0.1 :

SANS 0100 - 1 ed 2.2 Table 14

asy 0.015 :

Msx asx n * Lx 2^* : 15788.535 N *

Msy asy n * Lx 2^* : 2368.28 N *

cover 15 mm * :