Site, Drainage & External Works - College Farm, Keysoe, Bedford - Schedule of Work 08 Jun 2010

Transcription

1 Site, Drainage & External Works - College Farm, Keysoe, Bedford - Schedule of Work 08 Jun 2010

2 Table of Contents Title Page 0 SITE OVERALL 3 1 EXTERNAL WORKS 5

3 0 SITE OVERALL 0.1 Site Clearance 10 Topsoil Strip Location : Courtyard & Area within Site Boundary Surplus Subsoil From Excavations (D20) Disposal : Spread and level on site in areas where variation in level is not critical. Topsoil Stripping (D20) Extent : Areas where there will be regrading, buildings and paving/ roads. Depth : 50 mm. Topsoil Treatment : Minimum two weeks before excavating topsoil, apply a suitable translocated nonresidual herbicide. Disposal : Spread and level on site surplus excavated topsoil. Do not raise soil level within the root spread of existing trees that are to be retained. Small Tree Shrub Hedge And Root Clearance (D20) Extent : As identified on site. Small Trees Shrubs And Hedges : Cut down. Roots : Grub up and dispose of without undue disturbance of soil and adjacent areas. Disposal : Remove from site. Site Clearance (D20) Extent : Clear site of rubbish, debris and vegetation. Do not compact topsoil. Chipping And Shredding : Permitted. Treatment Of Cleared Ground : Apply a suitable residual herbicide to areas to receive gravel surfacing. Disposal : Remove from site. Removing Concrete Apron & Covered Area Location : Courtyard Extent : As drawing number Action : Remove from site. Base Layers : To remain in position. Exposed Bedding : To remain in position. Total for page To be carried forward to Section 0 collection (page 4)

4 Collection for Section 0 SITE OVERALL Page 3 Total for Section 0 To be carried forward to Tender Summary (page 15)

5 1 EXTERNAL WORKS 1.1 Site Works Site Preparation 20 Site clearing Drawing Reference : Location : Courtyard and around building extent of work to be agreed with employer. Site Clearance (D20) Extent : Clear site of rubbish, debris and vegetation. Do not compact topsoil. Treatment Of Cleared Ground : Apply a suitable residual herbicide to areas to receive gravel surfacing. Disposal : Remove from site Surface Treatments 30 Pedestrian Areas With Asphalt Surface Course Drawing Reference : Location : Courtyard Excavation (D20) Extent : To be agreed on site. Granular Sub Base (Q20) Material : Highways Agency Type 1 unbound mixture. Minimum Thickness : 100 mm. Accuracy Of Sub Base : ±20 mm from required falls and cambers. Herbicide For Subgrade (Q20) Type : Residual. Preparation : Grub-up vegetation. Mastertint Asphalt Finish To Pedestrian Route (Q22) Base : Hardcore, blinded. Base Compacted Thickness : mm nominal, 55 mm minimum at any point. Binder Course : AC 20 dense bin, grade 40/60. Binder Compacted Thickness : As drawing. Surface Course : As drawing. Surface Compacted Thickness : 25 mm nominal. Reclaimed Content : Surface course maximum 10%, other courses maximum 50% Site Enclosure and Division 40 Securing Site Steel Fencing Insert Name : Harras fence or similar approved. Manufacturer : Harras Fencing or similar approved manufacturer. Product Reference : Standard Note : Principal must make sure that site is secure at all times by installing adequate temporally metal fencing. Total for page

6 1.2 Drainage 50 Plastics Pipe Domestic Foul Drainage System Drawing Reference : 293-A/B31 Location : As drawing. General Bedding Class To Plastics Pipework : Class T - full depth granular support to 100 mm above pipe crown, single size or graded material. General Bedding Class Below Buildings : Class Y concrete surround below building when crown of pipe within 300 mm of underside of floor slab and Class W concrete surround to 100 mm above pipe crown, single size material over when crown of pipe more than 300 mm from underside of floor slab. Granular Material : To BS EN Drainage Invert Levels : To work out onsite. Access Chamber Cover Levels : To work out onsite. Excavation (D20) Extent : To agree on site. Design Of Below Ground Drainage Systems (R12) Design : Complete the design and selection of junctions, bends and fittings to the below ground drainage system. General Arrangement : As drawing. Proposals : Submit drawings, technical information, calculations and manufacturers' literature relating to any design work carried out. Solid Wall PVCU Pipework For Below Ground Drainage Systems (R12) Manufacturer : Hepworth or similar approved. Product Reference : Kitemark certified. Recycled Content : Contractor's choice. Size : DN 110. Jointing : Polypropylene sleeve. Waste And Discharge Stack Connectors To Below Ground Drainage Systems (R12) Manufacturer : As drainage pipework. Product Reference : Contractor's choice. Type : As manufacturer's recommendations. Bends At Base Of Soil Stacks For Below Ground Drainage Systems (R12) Manufacturer : As drainage pipework. Product Reference : To be agreed. Nominal Diameter : As connected below ground drainage pipework. Type : Contractor's choice. Minimum Height Of Invert Of Horizontal Drain : 750 mm at base of stack below centreline of lowest branch pipe. Rodding Points For Below Ground Drainage Systems (R12) Manufacturer : As drainage pipework. Type : Manufacturer's standard. Size : As drainage pipework. Bedding And Surround : Concrete (general), thickness 100 mm (minimum). One Piece Access Gullies And Covers For Below Ground Drainage Systems (R12) Manufacturer : As drainage pipework. Product Reference : Contractor's choice. Type : Vertical back inlet access gully. Material : Manufacturer's standard. Size : Manufacturer's standard. Outlet : DN 100. Cover : Manufacturer's standard. Bedding : Concrete (general), thickness 100 mm (minimum). Surround : Granular, size 4/10, minimum thickness 150 mm (minimum). Total for page

7 Plastic Access Points For Below Ground Drainage Systems (R12) Manufacturer : Hepworth or similar approved. Size : 300 mm diameter. Base : Manufacturer's standard. Raising Pieces : Contractor's choice. Raising Piece Height : Selected/ cut to suit invert/ cover levels. Access Covers And Frames : Manufacturer's standard. Cover Loading Grade : Manufacturer's standard. Bedding : Granular, size 4/10, minimum thickness 100 mm (minimum). Surround : Granular, size 4/10, minimum thickness 100 mm (minimum). Plastics Inspection Chambers For Below Ground Drainage Systems (R12) Manufacturer : As drainage pipework. Diameter : 450 mm. Base : Manufacturer's standard. Shaft Units : Manufacturer's standard. Access Covers And Frames : Manufacturer's standard. Cover Loading Grade : Manufacturer's standard. Concrete Collar : Concrete (general), 200 x 200 mm (minimum). Seating : Not required. Bedding : As pipe trench. Surround : Granular, size 4/10, thickness 100 mm (minimum). Access Covers And Frames For Below Ground Drainage Systems (R12) Manufacturer : Hepworth or similar approved. Material : Ductile cast iron. Type : Double seal and greased. Finish : Hot-dip galvanized. Size : 450 mm diameter. Loading Grade : Manufacturer's standard. Edging Trims : Not required. Accessories : Not required. Precast Concrete Seating : Not required. Saddle Connectors For Below Ground Drainage Systems (R12) Manufacturer : As drainage pipework. Product Reference : Contractor's choice. Type : Contractor's choice. Inlet Size : To suit pipe being connected. Saddle Size : Contractor's choice. Warning Marker Tapes For Below Ground Drainage Systems (R12) Product Reference : Hepworth or similar approved. Type : Heavy gauge polyethylene. Location : To all new below ground drainage pipelines. Colour : Manufacturer's standard. Width : Manufacturer's standard. Text : Manufacturer's standard wording for each drain type. Wire Detection Aid : Required. Completion Of Backfilling To Trenches And Excavations To Below Ground Drainage Systems (R12) Backfill For Excavations In Paved Areas : Selected fill compacted in layers to 200 mm (maximum) from finished ground surface. Backfill For Excavations In Planting Areas : Selected fill compacted in layers to 300 mm (maximum) from finished ground surface. 1.3 Minor Building Work Overall Site 60 Remove Hard Landscaping on Site Location : See drawings Total for page

8 Concrete Apron & Hard Landscape (E10) Extent : As drawing. Disposal : Break up and set aside suitable material for reuse as fill. Remove remainder from site. Proposal : Contractor to submit cost for the removal of concrete apron and all hard landscape on site. 1.4 Bin Store & Main Entrance Timber Gate 70 Concrete Paving to Floor Drawing Reference : & 029 Location : As drawings. Sand Bedding For Concrete Paving (Q24) Type : Graded natural sand as defined in Reference Specification for each application on well compacted hardcore minimum 150mm. Nominal Thickness After Final Compaction : 50 mm. Sand Dressing For Concrete Paving (Q24) Dressing : Leave a thin layer of dry jointing sand over the paving, sweep clean before practical completion. Hardcore For Concrete Paving (Q24) Type : Well compacted hardcore minimum 150mm. 80 Clay Brick Solid Wall Below Dpc Drawing Reference : Location : As drawing. Backfill Under Soil Areas (D20) Material : Selected as dug material, laid and compacted in 300 mm maximum layers. Hardcore Backfill Under Ground Bearing Slabs And Paving (D20) Compacted Thickness : 150 mm (minimum). Material : Any one of the types listed in reference specification D20. Clay Brick External Solid Wall Below Dpc (F10) Brick Type : Clay facing bricks. Work Size : 215 x 102 x 65 mm. Colour And Texture : Manufacturer's standard. Durability Designation : Manufacturer's standard. Wall Thickness : 215 mm. Extent : As drawing. Bond : As general walling. Mortar Mix : 1:0.5:4 cement:lime:sand. Joint Profile : Bucket handle. 90 Clay Brick External Solid Wall Above Dpc Drawing Reference : Flexible Sheet Damp Proof Course (F30) Manufacturer : Visqueen or similar approved manufacturer. Product Reference : Agrément certified. Type : Manufacturer's standard. Width : Full width of leaf, together with specified projection. Joints : 100 mm minimum laps. Outer Edge : Project 5 mm from facework, 20 mm at openings. Clay Brick External Solid Wall Above Dpc (F10) Brick Manufacturer : Reclaimed bricks to match existing. Type : Clay facing bricks. Work Size : 215 x 102 x 65 mm. Durability Designation : Manufacturer's standard. Wall Thickness : As drawing. Bond : To match existing. Mortar Mix : 1:0.5:4 cement:lime:sand. Joint Profile : To match existing.. Total for page

9 100 Hardwood Posts & Timber boarded Fence Drawing Reference : & 029 Location : As drawing. Post Centres : 1800 mm maximum. Fence Height : 1800 mm. Excavation (D20) Extent : To be agree on site. Sawn Main Posts To Wood Post And Rail Fencing (Q40) Type : Sawn wood posts for post and rail fence. Size : 100 x 150 mm to 1800 mm high nailed timber boarded fence. Base Type : Base pointed for driving. Species : Durable hardwood, heartwood only. Preservative Treatment : To provide a 15 year service life. Setting In : Set in post hole with concrete surround. Timber Boarding : 100mm wide, thickness to standard fence manufacturer standard size. 1.5 Main Timber Fence & Existing Brick Wall 110 New Timber Gate and Posts Drawing Reference : Type : Timber gate to match existing. Wood Staining System (M60) Preparation : Prepare surfaces for decoration. Initial Coats : Two coats water based base stain. Initial Coat Colour : As manufacturer's recommendation for final stain colour. Finishing Coats : Two coats water based woodstain. Finishing Coat Colour : To be confirmed. Manufacturer : To match existing. 120 Existing Wall Drawing Reference : Treatment : Contractor to make good wall and increase height to 1800 mm with reclaimed bricks to match existing. 1.6 Services Enclosure 130 Plain Concrete Ground Floor Slab Drawing Reference : & 042 Location : Services Enclosure Excavation & Foundation Details (D20) Extent : To Structural Engineer's details. Concrete For Unreinforced Floor Slabs (E10) Thickness : As drawing. Concrete : Designated GEN2. Maximum Aggregate Size : 20 mm. Coarse Recycled Concrete Aggregates : Permitted. Consistence Class : Contractor's choice. Admixtures : Concrete producer's choice. Surface Finish : Contractor's choice to suit specified covering. Surface Regularity : Maximum 5 mm gap below a 2 metre straight edge. Loose Laid Polyethylene Damp Proof Membrane (J40) Manufacturer : Visqueen or similar approved manufacturer. Product Reference : Agrément certified. Recycled Content : Contractor's choice. Thickness : 300 micrometres (1200 gauge). Joints : Continuous mastic strip between 150 mm minimum overlaps. Top sheet sealed with jointing tape. Total for page

10 Soft Blinding For Polyethylene Damp Proof Membrane (J40) Material : Soft sand or pulverized fuel ash. Thickness : 50 mm minimum. Hardcore Under Concrete Slabs (D20) Compacted Thickness : 150 mm (minimum). Material : Crushed hard rock or quarry waste (other than chalk), with not more binding material than is required to hold the stone together. 140 Clay Brick Solid Wall Below Dpc Drawing Reference : & 042 Location : As drawing. Backfill Under Soil Areas (D20) Material : Selected as dug material, laid and compacted in 300 mm maximum layers. Hardcore Backfill Under Ground Bearing Slabs And Paving (D20) Compacted Thickness : 150 mm (minimum). Material : Any one of the types listed in reference specification D20. Clay Brick External Solid Wall Below Dpc (F10) Brick Type : Clay facing bricks. Work Size : 215 x 102 x 65 mm. Colour And Texture : Manufacturer's standard. Durability Designation : Manufacturer's standard. Wall Thickness : 215 mm. Extent : As drawing. Bond : As general walling. Mortar Mix : 1:0.5:4 cement:lime:sand. Joint Profile : Bucket handle. 150 Clay Brick External Solid Wall Above Dpc Drawing Reference : & 042 Flexible Sheet Damp Proof Course (F30) Manufacturer : Visqueen or similar approved manufacturer. Product Reference : Agrément certified. Type : Manufacturer's standard. Width : Full width of leaf, together with specified projection. Joints : 100 mm minimum laps. Outer Edge : Project 5 mm from facework, 20 mm at openings. Clay Brick External Solid Wall Above Dpc (F10) Brick Manufacturer : Reclaimed bricks to match existing. Type : Clay facing bricks. Work Size : 215 x 102 x 65 mm. Durability Designation : Manufacturer's standard. Wall Thickness : As drawing. Bond : To match existing. Mortar Mix : 1:0.5:4 cement:lime:sand. Joint Profile : To match existing.. Air Bricks And Wall Ventilators (F30) Type : Clay air brick, colour to match existing bricks. Work Size : As drawing. Outer Face Position : Flush with wall face. Spacing : As drawing. 160 External Softwood Framed & Legged Door And Frame Drawing Reference : Total for page

11 External Softwood Framed & Legged Door Leaf (L20) Manufacturer : Jeld-Wen or similar approved manufacturer. Type : Manufacturer's standard. Size : As schedule. Wood Species : Manufacturer's standard. Finish As Delivered : Factory applied basecoat stain for site finishing. External Softwood Door Frame (L20) Manufacturer : As door manufacturer. Overall Size : As schedule. Threshold Seal : Manufacturer's standard mobility threshold seal. Weatherstripping : Manufacturer's standard rebated weatherstrip. Finish As Delivered : Factory applied basecoat stain for site finishing. Fixing : As manufacturer's recommendations. Single Axis Door Hinges (P21) Type : Double washered butt. Material And Finish : Steel. Size : Contractor's choice. Grade : Contractor's choice. Number Per Leaf : Three. Position : As drawing. BS 3621 Thief Resistant Door Mortice Lock (P21) Type : 5 lever security mortice deadlock. Latch Bolt Type : One way action for sprung lever handles. Backset : 57 mm. Material And Finish : Polished brass faceplate. Keying : Not master keyed. Rebate Set : 25 mm rebate set. Lever Handles (P21) Manufacturer : Employer's choice. Type : Employer's choice. Size : Manufacturer's standard. Mounting : Square sprung plate with screw fixing. Material And Finish : As schedule. Door Bolt (P21) Manufacturer : Employer's choice. Type : Employer's choice. Length : Employer's choice. Material And Finish : As door furniture. Wood Staining System (M60) Manufacturer : Employer's choice. Preparation : Prepare surfaces for decoration. Initial Coats : Two coats water based base stain. Initial Coat Colour : To be confirmed. Finishing Coats : Two coats water based woodstain. Finishing Coat Colour : To be confirmed. External Sealant Pointing To Frames (M60) Type : Silicone, colour to be confirmed. Profile : Convex. 170 Electrical Lighting Circuit to Services Enclosure Location : Internal Light Contractors Design : Contractor design to electrical installation. Cables Conduit And Trunking : Submit proposals. Accessories : Submit proposals. Luminaires : Not required. Electrical Testing Commissioning And Documentation : As specified. Builders Work : Submit proposals. Total for page

12 Inspection And Testing Of Electrical Installation (V90) Inspection And Testing Certification : Submit two copies of electrical installation certificate completed in accordance with BS Documentation For Electrical Installation (V90) Contents : To current Building Regulations. 180 Trussed Rafter Double Pitch Roof Infill Roof : To match existing Location : Services Enclosure Trussed Rafters (G20) Product Reference : To match existing and to line up with Unit 4 roof Truss Configuration : Double pitch. Design Loads : To Structural Engineer's details. Manufacturer : Employer's choice. Calculations : Submit. Minimum Truss Member Thickness : All members: 44 mm. Treatment : Truss manufacturer's standard. Truss Spacing :. Pitch : To Structural Engineer's details. Overall Span : As drawing. Softwood Wall Plate To Trussed Rafter Roof (G20) Size : 100 x 50 mm. Treatment : Required. Fixing : Bedded on fresh mortar and anchored with vertical restraint straps. Softwood Bracing To Trussed Rafter Roof (G20) Type : Softwood diagonal and longitudinal bracing to trussed rafters. Strength Class :. Species : Contractor's choice. Size : To Structural Engineer's details. Configuration : To Structural Engineer's details. Treatment : As trussed rafters. Fixing : Two galvanized 3.35 mm wire nails into every rafter. Minimum length equal to bracing thickness plus 32 mm. Truss Clips (G20) Size : To suit timber member. Material : Galvanized steel. Fasteners : 32 x 3.5 mm galvanized or sherardized square twisted nails in every hole. Vertical Restraint Straps To Wallplates (G20) Type : Cranked end. Material : Hot dip galvanized mild steel, coating 260 gm/m² (minimum). Cross Section : 30 x 2.5 mm. Length : 100 mm cranked end x 1050 mm long. Centres : 2000 mm (maximum). Fixing To Masonry : Five 4.8 x 70 mm masonry screws evenly spaced. Locate at least one screw within 150 mm of bottom end of strap. Fixing To Wallplate : Minimum two 30 x 3.5 mm galvanized square twist nails. Lateral Restraint Straps To Rafters (G20) Manufacturer : Hot dip galvanized mild steel, coating 260 gm/m² (minimum). Type : Twisted with cranked end. Material : Hot dip galvanized mild steel, coating 260 gm/m² (minimum). Length : 150 mm cranked end and to carry over at least three rafters. Cross Section : 30 x 5 mm (minimum). Centres : To Structural Engineer's details. Location Of Straps : To noggings between rafters. Bracing Of Rafters Parallel To Wall : Brace with tightly fitted packing and solid softwood noggings 50 mm x two thirds depth of member (minimum). Fasteners : Not less than four 50 mm x 8 gauge sherardized countersunk screws per strap evenly spread. Total for page

13 190 Plasterboard Dry Lining To Ceilings Drawing Reference : & 042 Location : Services Enclosure Plasterboard Ceiling Dry Lining (K10) Manufacturer : Gypsum or similar approved manufacturer. Type : Fire protection plasterboard. Recycled Content : Contractor's choice. Layers : One. Thickness : 15 mm. Edge Profile : Tapered. Fixing : Manufacturer's standard. Joints : Taped and filled. Finish : Prepared for plaster skim coat. Emulsion Painting System (M60) Manufacturer : Employer's choice. Preparation : Prepare surfaces for decoration. Initial Coats : Thinned coat emulsion. Finishing Coats : Two coats vinyl matt emulsion. Colour : Employer's choice. Total for page

14 Collection for Section 1 EXTERNAL WORKS Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Total for Section 1 To be carried forward to Tender Summary (page 15)

15 Site, Drainage & External Works - College Farm, Keysoe, Bedford - Schedule of Work Tender Summary Preliminaries 0 SITE OVERALL (page 3) 1 EXTERNAL WORKS (page 5) Total Signed For and on behalf of Date