2A - LIMITS FOR BLASTING VIBRATIONS 2B - SCHEDULE OF QUANTITIES
2C - DELEGATION OF POWERS 2D - QUANTITY MEASUREMENT 2E - ESCALATION TREND
LIMITS FOR BLASTING VIBRATIONS (Green, 1975)
Particle velocity V mm/s Damage
0,5 Threshold of human perception unlikely to cause damage of any type
5,0 Limit for blasting adjacent to historical monuments
25,0 Limit for blasting near private dwellings in order to reduce disturbance to residents to a minimum
48,5 Limit for blasting adjacent to residential structures on good foundations
84,0 Limit for property owned by concern doing the blasting
119,0 Recommended level for blasting adjacent to sturdy reinforced concrete structures
305,0 Rock falls in unlined tunnels
635,0 Onset of cracking of rock
2540,0 Breakage of rock
These limits refer to the resultant peak particle velocity of the ground adjacent to the building and not to the vibration of any part of the building.
APPENDIX 2A
Contractual Aspects and General Duties 2-39
CONTRACT NO NRA XXX
REHABILITATION OF N1 BETWEEN CAPE AND CAIRO PAYMENT CERTIFICATE NO 15
Quantity Estimated Final Var Est vs Sched Estimated Outstanding
Billed Previous Month To Date Quant Amount Quant Amount Quant Amount
(ii) Contractor's handling charges and profit on subitem 15.03(n)(i)
(c) Existing gravel shoulders used as temporary deviations
Maintenance of the bituminous surfacing and pavement of temporary deviations
(c) Repair of potholes and edge breaks using e.g. Roadmix (cold coarse mix)
SCHEDULE A: GENERAL & ROADWORKS ACCOMMODATION OF TRAFFIC
(h) Delineators (TW401 and TW402) 800 mm x 250 mm overall size:
(n) Other traffic control measures ordered by the engineer:
PART 2. DELEGATION OF POWERS TO THE RESIDENT ENGINEER WITH REFERENCE TO THE FIDIC GENERAL CONDITIONS OF CONTRACT
SECTION A
The Resident Engineer may:
1. Furnish the Contractor with drawings, specifications and instructions necessary for the proper and adequate execution of the Works Subclauses 1.8 and 3.3 2. Ensure that the Contractor pays all fees and gives all notices as necessary
Subclause 1.13(b) 3. Give further possession of Site from time to time to enable the Contractor to proceed with the Works in accordance with his approved programme Subclause 2.1 4. Require the Contractor to allow appropriate opportunities for carrying out work to other
contractors and other persons Subclause 4.6
5. Furnish the Contractor with reference points, lines and levels. Check any setting out done by the Contractor and require the Contractor to rectify errors Subclause 4.7 6. Require the Contractor to provide necessary signs or directions along access routes
Subclause 4.15(b) 7. Ensure that the Contractor has adequate equipment on Site and order, or consent to, the
removal of major items Subclause 4.17
8. Ensure that the Contractor complies with the provisions and requirements regarding the use
of land Subclause 4.23
9. Issue instructions to the Contractor concerning the action to be taken regarding fossils, etc.
found on site. Subclause 4.24
10. Permit work outside normal working hours in terms of subclause 6.5(c) but not otherwise Subclause 6.5(c) 11. Ensure that the Contractor complies with the provisions of subclauses 6.6 and 6.7 in respect of his employees’ welfare, health and safety and that the necessary records are maintained.
Call for reports as and when required Subclauses 6.6 & 6.7 12. Require the Contractor to remove from Site any of his employees except the Contractor’s
Representative Subclause 6.9
13. Carry out all the duties of the Engineer as prescribed in clause 7: Plant, Materials and Workmanship, with the exception that the Resident Engineer may not employ other persons to carry out remedial work in terms of subclause 7.6 Clause 7 APPENDIX 2C
15. Suspend progress of all or part of the Works for any of the following reasons:
(a) for the proper execution of the works, (b) by reason of weather conditions on the site
(c) by reason of some default or breach of the contract on the part of the Contractor (d) for the safety of the works or any part thereof, or
(e) for the safety of the public,
but not otherwise Subclause 8.8
16. Require the Contractor to clear the site on completion Subclauses 4.23 & 11.11 17. Measure the Works and require the Contractor to give such assistance and particulars as
necessary Subclauses 12.1 &12.3
18. Order expenditure in connection with Provisional and Prime Cost Sums and require the Contractor to produce quotations, invoices, vouchers, accounts and receipts
Subclause 13.5 19. Require the Contractor to make good his failure to carry out any of his obligations under the
contract Subclause 15.1
20. Ensure that the Contractor indemnifies the Employer in respect of death, injury damage and
loss in terms of subclause 17.1 Subclause 17.1
21. Require the Contractor to make good and repair loss or damage to the Works, Goods, or
Contractor’s Documents Subclause 17.2
22. Require the Contractor to submit acceptable invoices in respect of Special Materials
CONTRACT PRICE ADJUSTMENT SCHEDULE — item 4(1) SECTION B
With regard to the following matters the Resident Engineer shall have no power of decision but shall receive any submissions from the Contractor (where applicable) and refer the matters to the Engineer.
The Resident Engineer shall, therefore, have no powers to:
1. Explain or adjust any ambiguities or discrepancies in the Contract Documents Subclause 1.5 2. Permit the Contractor to assign the Contract or part thereof Subclause 1.7 3. Require the Contractor to disclose Confidential information Subclause 1.12 4. Agree or determine any matters in terms of subclause 3.5 Subclause 3.5 5. Approve Contractors designs and details or authorize deviations there from Subclause 4.1 6. Approve or withdraw approval of the Contractor’s representative Subclause 4.3 7. Grant permission to the Contractor to sublet any part of the Works or to appoint and hire a
subcontractor Subclause 4.4
8. Instruct the Contractor to assign the benefit of a subcontractor’s obligations in terms of
Subclause 4.5 Subclause 4.5
9. Make any decision regarding unforeseeable physical conditions Subclause 4.12 10. Approve or reject the Contractor’s programme or revised programmes Subclause 8.3
11. Grant extension of time Subclause 8.4
12. Notify the Contractor regarding the rate of progress Subclause 8.6 13. Grant permission to the Contractor to expedite progress Subclause 8.6 14. Suspend the progress of all or part of the Works for any reason other than those described in item 15 of SECTION A of PART 2 of this document Subclause 8.8 15. Permit Works that have been suspended for more than 84 days, to proceed Subclause 8.11
16. Issue a Taking Over Certificate Subclause 10.1
17. Issue a Performance Certificate Subclause 11.9
18. Agree to, or determine, new rates or prices Subclause 12.3
19. Order any Variation or approve a Contractor’s proposal for a variation Subclause 13.3
20. Certify payments to the Contractor Subclause 14.6
21. Grant extension of time for submission of a claim Subclause 20.1
22. Issue a ruling on a Contractor’s claim Subclause 20.1