Item 505 - Riprap and Grouted Riprap

Item of Work for Riprap and Grouted Riprap for Volume III Projects
1701
1710
1711
1714
Density in kg/m3 of recycled broken concrete that can be used as an alternative for riprap stones
2245
2425
2254
2452
Classification of riprap with stones raging from 30kg to 70kg with 50% of the stones more than 50kg
A
B
C
D
Type of riprap that shall be used as weepholes
pvc
gi pipe
ppr
hdpe
Placing of riprap stones shall be perpendicular to the slope
true
false
The minimum thickness in mm of class C riprap is
500
600
700
800
The minimum diameter of weepholes shall be
1 in
2 in
4 in
3 in
In the construction of grouted riprap, the face of the stones shall not be left exposed
true
false
Minimum thickness in mm of cement mortar in grouted riprap
19
20
22
25
Pay item number of Riprap, Class A
505 1(a)
505 a(1)
0
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