Management

Charles Raphadi	Johan Janse van Rensburg	James Rautenbach

Experience, qualifications and professional status of our key staff:

NO	PERSON	YEARS EXP	YEARS WITH FIRM	HIGHEST QUALIFICATIONS	NQF LEVEL	POSITION	PROFESSIONAL   STATUS
1	M C Raphadi	22	20	National Diploma  (Civil Engineering)	5	Project Management, Contract Administration, Specialist Bridge Resident Engineer	Professional Engineering Technician ECSA Reg. No: 201130327
2	J J Janse van Rensburg	33	22	BEng(Hons)(Structural),   BEng(Civil)	7	Specialist Bridge Engineer	Professional Engineer ECSA Reg. No: 950018
3	J J Rautenbach	36	17	MEng (Structural), BEng(Hons)(Structural) BEng (Civil)	8	Specialist Bridge Engineer	Professional Engineer ECSA Reg. No: 910252

Shortened CV’s of our key staff:

M C (Charles) Raphadi

Charles Raphadi’s experience with Leporogo Specialist Engineers extends 20 years primarily in the field of Bridge and Road Engineering. He has become a specialist supervision engineer in bridge construction over the years. His experience includes project management, contract administration and site supervision for the construction of bridges, in–situ drainage culverts, pre-cast drainage culverts and ±25km of road construction (Tar and gravel). From 2010 to 2013 he was involved in the annual bridge inspections for the Roads Agency Limpopo’s Bridge Management System, and data quality management procedures. He has executed 275 bridge inspections thus far for the Roads Agency Limpopo’s Bridge Management System.

He is since May 2021 the Resident Engineer(Structures) structures on the upgrade of the National Route 3, sections 2 and 3, from Lynnfield Park to Ashburton, which is one of SANRAL’s major current construction sites, where he is responsible for all project administration and supervision for structures. From 2016 to April 2021 he was the Resident Engineer (Structures) responsible for the supervision of the construction of 7 bridges and 4 major culverts on Phase 2 of the National Route 1 Section 27 (N1 Polokwane Bypass – Phase 2) for the South African National Roads Agency (SANRAL). Just before Phase 2 of the Polokwane Bypass, he was the Resident Engineer, for the construction of a 138m long high-level bridge over the Crocodile River near Koedoeskop in Limpopo for the Roads Agency Limpopo (RAL). In 2012 he was the Resident Engineer for a 100m long bridge over the Molototsi River for Mopani District Municipality. In 2009 and 2010 he was the Resident Engineer (Structures) responsible for the supervision of the construction of 6 major bridges on the N1-27 (N1 Polokwane Bypass -Phase 1) for the South African National Roads Agency (SANRAL). During 2006 to 2008 he was the Resident Engineer, and supervised the construction of a 160m long bridge over the Klein Letaba River and 15km tar road near Hlomela in Limpopo for the Roads Agency Limpopo (RAL).

In 2007 he became the principal member/shareholder of Leporogo Specialist Engineers, and in 2013 he became the sole member/shareholder of Leporogo Specialist Engineers. He obtained his National Diploma in Civil Engineering in South Africa from the Vaal Triangle Technikon end of 2003, and was registered as a Professional Engineering Technician with the Engineering Council of South Africa(ECSA) in 2011. He is also a registered member with the South African Black Technical & Allied Careers Organization (SABTACO).

J J (Johan) Janse v Rensburg

Johan Janse van Rensburg’s experience extends 33 years primarily in the field of structural and bridge engineering. He was the co-founder of the specialist bridge and structural consultancy firm Leporogo Specialist Engineers CC. This firm has for the past 23 years been involved in the design and construction supervision of numerous bridge and road construction projects.

His structural engineering experience is diverse, ranging from the development of Bridge Management Systems, the integration of Bridge Management systems in Road Management Systems, Contract Management, the detail design of structures, supervising inspection of ± 2300 bridge structures, through to construction supervision of various road and bridge projects. From 1997 to 2013 he was annually involved with the Bridge Management System of the Roads Agency Limpopo. In 2004 he was registered as a Certified Senior Bridge Inspector with SANRAL and COTO. He was involved as a senior bridge design engineer on a number of SANRAL projects, of which a few are (detail design completed):

• National Route 1, Section 27 : Polokwane bypass
• National Route 11, Section 9 between Hendrina and the N4
• National Route N11, Section 13x : Mokopane Ring Road
• National Route 3, sections 2 and 3, from Lynnfield Park to Ashburton
• National Route 2, sections 24 and 25, from Lovu River to Umlaas Canal

One area of particular interest with regard to the parameters used in bridge design concerns the extent of extreme rainfall/runoff events.  In furthering his interest he has attended a number of advanced bridge hydrology and hydraulic courses as a consequence.

Till 15 December 2000 he has been a Director at Africon Engineering International's ( now Aurecon) Bridge Engineering Division and the project leader for the implementation of all Bridge Management Systems for Clients such as Gautrans, Eastern Cape Province, Northern Cape Province, and the Limpopo Province. He was also the project leader for the design of all the road related structures on the N3 Toll Highway (Africon’s portion), and the Independent Engineer’s Bridge Engineer on the Platinum Toll Highway (N4-West). Mr van Rensburg has been the senior Resident Engineer supervising construction of the split-level Olievenhoutbosch (Samrand Avenue) interchange on the Pretoria-Johannesburg freeway.  The project did involve the unique jacking of a bridge underneath the N1 (Ben Schoeman) freeway.

He has recently gained some further international experience, as he was appointed as the project director of LEPOROGO-SOOSUNG JV in association with Afrisa Consulting, which was appointed by TANROADS for the construction supervision stage of the US$90 million Ubungo Interchange in Dar Es Salaam, Tanzania. He is also currently involved in the design of the 270m long Khubelu Bridge and the 120m long Mabunyaneng Bridge in Lesotho. He was also involved in bridge projects in other African countries such as Botswana, Namibia and Swaziland.

Mr van Rensburg since graduating in 1989 from Pretoria University was also awarded a BEng (Hons) degree in Structural Engineering in 1993 from Pretoria University, and was registered as a professional engineer with the Engineering Council of South Africa in 1995.

J J (James) Rautenbach

Mr J Rautenbach joined Leporogo Specialist Engineers in March 2006 as a specialist in the compilation of detailed design, drawings and specifications of new bridge structures, cell structures, service culverts, retaining walls and overhead road sign gantries, as well as all other transportation related structures. His resumé also includes the maintenance, rehabilitation and upgrading of existing transportation structures.

Prior to 2006, Mr Rautenbach has been a Technical Director and Shareholder of Africon Engineering International (now Aurecon). In his capacity as senior bridge engineer, he concentrated on the design of bridges and other transportation-related structures. Between 2001 and 2006 he was the system manager for the Africon Bridge Management System, installed at nine local and international authorities.

He is fully conversant in designing in the mediums of reinforced and prestressed concrete, structural steel as well as composite steelwork/concrete. Structures designed ranged from high-level multi-span bridges, e.g. a 460m long interchange bridge in Kuala Lumpur, and an innovative bridge jacking project on the N1 freeway between Johannesburg and Pretoria, to conventional road-over-rail, road-over-road and road-over-river bridges. He has experience in applying innovative design methods to enhance the utilization of labour-intensive construction methods. Mr Rautenbach has designed bridges in accordance with various codes of practice inclusive of TMH7, BS5400, SATCC and AASHTO. Apart from structural, geotechnical and hydraulic design, he has also been responsible for all relevant contract documentation and liaison with various railway and roads authorities. Mr Rautenbach has experience working in South Africa, Angola, Lesotho, Botswana, Namibia, Mozambique, Swaziland, Malawi, Ethiopia, Nigeria, Tanzania, Zambia, The Gambia and Malaysia.

Mr Rautenbach has attained considerable experience in the upgrading, repair and preventative maintenance of bridge structures. His paper “Deterioration rates of bridges in South Africa” was published in the journal of the International Conference on Concrete Repair, Rehabilitation and Retrofiiting, held in Cape Town in November 2005.

Mr Rautenbach is as a Certified Senior Bridge Inspector with SANRAL and COTO.