Specialised Civils

Tender description

Small-scale specialised civil engineering and building work associated with the construction, refurbishment, repair, maintenance and improvement of existing and new electricity substation sites within National Grid's Electricity Transmission and Distribution Networks, as well as domestic and residential works at customer premises as required. Lot 1: Concrete Repairs Concrete spalling repairs Concrete crack repairs Complete coating of structure (dependent upon status of damage of structure and depth of carbonation) Patch repairs to reinforced concrete structures including removal of spalled concrete, treatment of exposed or corroded & reinforcement and patch repairs with compatible materials Repair of concrete structural Support for above ground pipe supports & pits including concrete plinths & covers Muff Repairs (The exposed part of the concrete foundation of each leg of an overhead line tower. The muff prevents water ingress between the tower leg steelwork and the tower foundation. It is cast independently from the rest of the foundations and has no steel reinforcement.) Sprayed concrete repairs to culverts, arch structures and tunnels Lot 2: Foundation Maintenance & repair of overhead line tower base concrete foundations & tower muffs, including earthworks, erosion control etc Extension of current foundations and plinths Building of new foundations and plinths Underpinning of existing structures to stabilize failing foundations Lot 3: Brickwork/Masonry, Render & New Build Repair Repair of: o Brick work o Block work o Plaster o Render Small scale new construction eg. walls, secondary substation buildings General building works (domestic & non-operational) Lot 4: Driveways, Block Paving, Access Road Installation, resurfacing and repair of: o Access Roads o Footpaths o Driveways Example material types will include, but not be limited to: o Concrete o Brick o Asphalt / Macadam (black top) o Gravel o Block Paving o Stamped Concrete o Resin Lot 5: Small Scale Roofing & Cladding Installation & Repairs Pitched tiled roof repairs Flat roof repairs Cladding repairs eg. storage buildings on sites which are steel frame constructed with metal clad vertical walls. Cladding works to indoor switch houses and other similar buildings. eg. indoor switch houses which are of steel or aluminium trapezoidal cladding on a steel or concrete frame. Wind or mechanical damage repair including replacement of wall light ingress panels and replacement or insertion of additional fixings to provide greater wind resistance in vulnerable areas. These are usually complicated by working in the vicinity of high voltage equipment which is relatively fragile. Lot 6: Small Scale Fencing Installation & Repairs Small scale construction of substation fencing sections and foundations Repairs to substation fencing and gates Completion of new boundary fences Installation of gates, including sliding and power operated sliding gates Construction of concrete pathway adjacent to the fence Installation and repair of different types of fencing including: o Steel Palisade fencing o Timber fencing o Chain Link fencing o Mesh fencing Lot 7: Doors Installation / Maintenance / Repair of: o roller shutters o sliding/folding doors o sectional over doors o folding swing doors o canopy retractable doors Install/Repair/Replacement of 'Domestic' type internal and external general building access doors with varying levels of security requirement Install/Repair/Replacement of Flood Resistant doors Lot 8: Site/Built Area Drainage Installation / Repair of: Man Holes Oil separators Catch Pits Septic Tanks Cess Pits Sewage Treatment Plants Underground Containment / Dump Tanks Surface Water / Foul Water / Combined Drainage Lot 9: Landscaping Preparation and submission of landscape layout and design Site cleaning for landscape area Excavation and backfill of any works area Planting of trees/flowers/hedges & bushes Gravel laying if necessary Turf laying Lot 10: Small Scale Scaffolding (NGED Only) Scaffolding to ensure safe access during maintenance works Services shall include: Survey, Design, Supply, Erection, Inspection, Dismantle May include: system scaffolds, traditional pole and clip scaffolds Lot 11: Small Scale Building Repairs & Maintenance · General Plumbing Requirements: o Plumbing repairs o Blocked Pipes o Leak Detection o Pipe Fitting · General Electrical Requirements: o Fault Finding o Rewiring o Installation & Repairs o Lighting o Fixed Wiring Testing / remedial works (ED Only) o Portable Appliance Testing (ED Only) · Plastering · Painting & Decorating (excluding plant) · Floor laying (Operational, Non-operational, Domestic) · Installation of maintenance of raised access floors · Carpentry, Joining & Fabric Installation · Suspended Ceiling Installation Lot 12: Surveys and Geotechnical (NGET Only) Geotechnical Site Investigations Topographic surveying CCTV drain camera surveying Ground penetrating radar survey