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 or riprap with stones ranging from 30 kg to 70kg with 50% of the stones more than 50kg

• A

• B

• C

• D

Type of pipe 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

• 1in

• 2in

• 4in

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 for Riprap, Class A

• 505 (1)a

• 505 (a)1