BASIC RATES



DAM AND ALLIED WORKS
NOTES ON SCHEDULE OF RATES

1. All notes under General Notes on Schedule of Rates and Notes on Lead, Lift, Loading and un-loading Charges are  applicable to Dam and Allied  Works  also  to  the extent they are relevant.

2. Unless otherwise specified the basic rates are inclusive of all lifts

3. Unless otherwise specified the basic rates are inclusive of standard finishing required for concrete surface.

4. The basic rates for concrete items include cost of cleaning / green cutting top surface of previous lift of concrete and providing cement mortar layer before placing concrete for  next lift. The proportion of  cement mortar shall be same as  that of mortar portion in concrete.

5. For concrete, masonry and reinforcement steel items initial lead of 1km is considered in the basic rate. 

Additional lead charges  for cement and steel shall be  worked out  by deducting initial lead of 1 km from the total lead and loading and unloading charges shall be allowed in lead of 1 km from the total lead and loading and unloading charges shall be allowed in view of rehandling of cement and steel from site store / fabrication yard to work place.

Example : For cement.

Total lead for cement: 100 km

Less Rehandling lead included in basic rate: 1 km

Net lead for working out additional lead charges: 99 km

dditional lead charges  / tonne:First 5 kms`: 106.90                                                

Next 25 kms ( 25    x 6.50 `: 162.50

Balance 69 kms ( 69    x  6.10 `: 420.90                                                

Loading & unloading charges `: 279.40                                    

Total additional lead charges / tonne `: 969.70

Additional lead charges for sand, coarse aggregate, stones and stone chips shall  be worked out for total lead involved and 1 km lead charges included in  basic rate  shall be deducted from the total lead charges. No loading and unloading charges shall  be allowed since no rehandling lead is involved for these materials. 

Example : For sand.

Total lead for sand from approved sand quarry: 15 km

Initial lead included in the basic rate in the SR: 1 km

Additional lead charges  / cum : Lead charges for 5 km `: 111.20          

Lead charges for next 10 km (  10   x 10.30 )`: 103.00          

Total lead charges for 15 km /cum `: 214.20          

Less 1 km initial lead charges / cum `: -66.60                                    

Net additional lead charges / cum `: 147.60 

No loading and un-loading charges shall be added.

6. For earth / rockfill embankment works 1 km initial lead is considered in the basic rates. As storing / stacking / re-handling of materials is not involved for these works the lead charges  for  additional lead shall be worked out  for  total lead including  initial lead  of 1 km and then the cost of  first km lead shall be deducted. No loading  and un-loading charges shall be added as the additional lead does not involve rehandling of materials. 

Example : For soil.

Total lead for soil from approved borrow area: 2 km

Initial lead included in the basic rate in the SR: 1 km

Additional lead charges : Lead charges for 2 km `: 78.60                                    

Less Lead charges for 1 km `: -66.60                                    

Additional lead charges / cum `: 12.00

No loading and un-loading charges shall be added.

7. Cement content specified for cement concrete works in the item description is based on theoritical design mix computations and is exclusive of  wastage and  requirement for any incidentals. The actual cement content may vary  based on  trial  mix  studies. A suitable clause shall be included in tender for regulating  payment  for  any  upword or downword variation in cement content.

8. The quantities of materials  including  wastage, requirements for  incidentals  etc., for working out additional lead charges shall be as per the statement  of  requirement  of materials under this section.

9. The basic rates are exclusive of cost of site clearing and river diversion arrangements such as coffer dams, bunds, diversion channels etc. Separate sub-estimates shall be prepared for all types of coffer dams, bunds, diversion channels etc.

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