Heritage Cases

A 12 month construction timeframe and a budget estimate for the construction works of +/-R13m (ex. VAT), has been provided as a guideline. The extent of works entails the structural repair & refurbishment of the Cape stores basement structure and upgrade of the storm water and ground water drainage system to drain water away from the building. Internal and external waterproofing is also to be implemented in the basement. The upgrade of the facilities infrastructure and services to adhere to the latest South African National standards will also be undertaken. Addressing all the items on the scope of works mentioned in the introduction will ensure that the basement is able to function as a grade 4 basement (habitable ventilated basement with higher performance levels for ventilation & dehumidification than for a level 3 habitable basement). The List of scope of works items defined at tender stage and a brief explanation of each item as follows. Scope of works Outcome 1. Sealing of cracks Cracks in soffit +/- 400m = plaster cracks to be repaired to look more acceptable with a movement joint that is sealed with a product that will look acceptable, while also increasing the durability of the structure. Cracks in beams and walls = +/- 50m structural cracks to be repaired to ensure the structure is safe and waterproof. 2. Granite walkway on top of workshop Remove granite and waterproof the slab below and reroute rain water down pipe and connect to new storm water system. 3. Underpinning of some of the foundations in the Cape Stores basement. No visible signs of differential settlement, so foundations appear in order. Size of footings and founding material to be verified during excavation for sub-soil drains. Based on the preliminary investigation no foundation underpinning is envisaged. 4. Permanent reinforcement of the Cape Stores soffit. The steel beams inside the slab are the main structural elements. 3 locations occur where the steel beams are to be replaced and slab repaired. Applying a migratory corrosion inhibitor (MCI) and a waterproofing product in the concrete mix of the slab repairs (like Xypex or similar approved) to seal the slab will increase its durability. There are numerous old and outdated services on the soffit of the roof slab of the basement. Some of these are redundant and should be removed. Some are out dated and do not meet the latest SANS standards of safety and serviceability. Upgrading the infrastructure in the basement, while keeping all services running through the basement operational is also very important. Some of the outcomes will be more energy efficient services And meeting the latest fire protection regulations and Health and safety regulations. 5. Proper waterproofing, sealing, painting and proper defects repair work will have to be applied to remedy defects such as cracks, damage and dampness. The basement needs to function as a class 4 basement, and inside and outside waterproofing with an additional storm water and sub-soil drainage system around the perimeter is to be implemented. 6. The restoration of inadequate rainwater conveyance, expansion joints and grouting. New storm water system around the basement with the 3 rainwater down pipes leaking water into the basement to be connected with serviceable catch pits. 7. Repair work of boundary and retaining walls. Once the sub-soil drain and storm water system is installed and tested to confirm to functions as required, the boundary wall cladded with granite will be repaired. 8. Repair to aprons and hard surfacing surrounding and effected buildings Reinstate the existing finishes (granite copings & red brick pavers) and make good the surrounding buildings. As the area is next to a tourist route all the works will also have to be hoarded off to meet acceptable security and safety standards. 9. Repairs to underground and above ground stormwater systems and watercourses New paving below lower area to match red bricks elsewhere and proper slopes and new storm water system to drain water effectively. Investigation is limited to Cape Stores and surrounds only.