Week 2 Challenge

1 ans)a)b=260mm

d=20mm,do=20-2=18,t=20mm

no of bolts=((b-2xe)/p)=+1

p=2.5d=2.5*20=50

e=1.5d=1.5*20=30

no bolts=((260-2*30)+1

no of bolts=6

net section area=(b-ndo)t

=(260-6*18)20=3000mm^2

b)b=260mm,d=20mm,do=20-2=18mm,t=20mm

no of bolts=((b-2xe)/p)+1

p=2.5d=2.5*20=50,e=1.5d=1.5*20=30

now,((260-2*30/50)+1=6

net section area=(b-ndo)t=(260_6*18)20=3000mm^2

c ans)b=200mm,d=20mm,do=20-2=18,t=18

no of bolts=((b-2xe)/p)+1

p=2.5d=2.5*20=50,e=1.5d=1.5*20=30

now,((200-2*30)/50)+1=6

net section area=(b-ndo)t=(200-6*18)20=1840mm^2

2 ans)f=5/8*w*sino*s*4

=5/8*100*9.81*sin15*8*4

=5061.96n

area=f/0.6fy

pixd^2/4=5061.96/0.6*250

d=6.5mm

3 ans)