Week 6 Challenge
1. Chequered Plate design
Design a chequered plate to carry a uniformly distributed Factored live load of 15 kN/m2. Consider the plate is spanned with dimension of 1200 mm x 5000 mm with all edges fixed. (Refer Roarks chart table 11.4)
ASSUME LX = 1.2M
Ly = 5M
RATIO >2 , SO ONE WAY SLAB
2. Design of Decking slab.
Design thickness of RC slab required to carry Dead load of 5 kN/m2 & Live Load of 8 kN/m2 for a mezzanine floor in an Industrial structure with plan as shown below. Provide optimum spacing of the secondary beam and also choose the decking sheet profile to be used. Neglect the composite action of decking sheet and RC slab. Decking sheet is provided only for formwork purpose.
GIVEN
DEAD LOAD = 5KN /M2
LIVE LOAD = 8KN/M2
TOTAL LOAD = 13 KN/M2
FACTORED LOAD = 1.5*13 = 19.5 KN/M2
Ly =10m
Lx= 8m
ratio = ly/lx = 1.25 so two way slab
MOMENT = WL^2/8 = 19.5*8*8/8 =156 KN-M
M= 0.138 *fck*bd2
156 = 0.138 *30*1000 *d2
d= 194.6
take d = 200 mm
overall depth = 200+25+10/2 = 230 mm
3. Lateral Load resisting system & Gravity Load resisting system
Draw the load path and identify the Axial force type in different type of bracing system below to resist horizontal shear & gravity load. Also state the type of bracing system
deflection
