6.1 General 6.1.1 General 1 Reference for Drawing (P) 4 Tolerance and Surface Finish of Running Track (Existing Tanks) (P) Maximum deviation from level shown on GA (mm) Maximum step height (mm) Surface finish 5 Direction of Rotation – Plan View () (P) Clockwise Anti-clockwise 6.1.2 Weights and Lifting Arrangements 1 Weights of Major Components (S) Component (Specify) Weight (kg) 1 Heaviest maintenance lift (S) 1 Heaviest erection lift (S) 6.1.7 Bearings and Lubrication 6a) Lubrication Pipework Material (P/S) 7 Method of Bearing Re-greasing () (P/S) Manual Auto grease dispensers Centralised pumped system 8 Minimum Capacity/ Life of Grease Dispensers (cc/months) (P/S) 6.1.9 O & M Manuals 1 Reference for Purchaser’s Particular Specification (P) 6.2 Bridge Construction 6.2.1 General 1 Bridge Material (Mild Steel*) (Specify Grade) (P) 1 Method of Corrosion Protection (Galvanising*) (P) 3 Bridge Loadings (P) c) Via walkway flooring (kN) e) Sludge Loading on Blades (kN/m2) (refer to note below) e) 0.6 kN/m2 for FSTs/Humus Tanks or 2.0 kN/m2 for PSTs/Storm Tanks* 6.2.2 Walkway 1 Full Bridge Scrapers to only Incorporate a Walkway on one Half of the Bridge (Y*/N) (P) 2 Minimum Width Between Guard-Rails (750 mm*) (P) 4 Type of Walkway Flooring () (P) a) Steel or Al open bar grating (depending on bridge material) b) GRP open bar flooring 9 Method(s) of Edge Protection () (P) Toeboards Infill panels (1/2 height) Infill panels (full height) 6.2.3 Guard-Rails 2 Reference for Purchaser’s Particular Specification (P) 6.2.4 Access onto Bridge 2 Party Responsible for Providing Means of Access onto Bridge () (P) Bridge Supplier Other (specify) 4 Ladder Requirements (Where Appropriate) (P) a) Type of Ladder(s) () (P) Permanently fixed Extensible - retractable Extensible - hinged Detachable
b) Reference for Purchaser’s Particular Specification (P) 6.2.5 Drive End Davit Socket(s) (Where Required) 1 Required (Y/N) (P) 2 Reference for Purchaser’s Particular Specification (P) 6.2.6 Facilities to Allow Access to the Tank Floor/Effluent Channel from the Bridge (Where Required) 1 Required (Y/N) (P) 1 For Access to: () (P) Tanks floor Effluent channel 2 Reference for Purchaser’s Particular Specification (P) 6.3 Central Tripod 1 Tripod Material () (P/S) Structural steel (specify grade) Stainless steel (specify grade) 6.4 Central Bearings 1 Slewing Ring Bearing Manufacturer (S) 6.5 End-Carriage(s), Wheels and Tyres 3 Distance Between Wheels (1200 mm*) (P) 4 Type of Fixings (P/S) 5 Wheel Material (P/S) 5 Axle Material (P/S) 6 Tyre Material (Polyurethane*) (P/S) 6 Dimensions (mm) (S) Diameter Width 12 Heater Required (Y/N) (P) 6.6 Scraper Drive System(s) 1 Full Bridge Scrapers to Incorporate a Dedicated Drive for each (Y*/N) (P) 3 Method of Power Transmission from Drive to Wheels (Direct Drive*) (P/S) 4 Drive System to Allow Load Monitoring Eqpt to be Fitted to Bridge (Y/N) (P/S) 5 Method of Mechanical Overload Protection () (P/S) Current monitoring Torque limiting coupling Other (specify) 7 Gearbox Specification (P/S) Type & (no. of stages) Manufacturer Service factor Service Life Final drive ratio 11 Position of Motor/Gearbox () (P/S) Within tank wall Outside tank wall Above tank wall 6.7 Diffuser Drum 3 Drum Material (P/S) 6 Scum Removal Facilities () (P/S) None Cut-outs with scoops Cut-outs with sluice plates 7 Energy Dissipating Inlet Required (Y/N) (P) 7 Reference for Purchaser’s Particular Specification (P) 8 McKinney Baffle Required (Y/N) 8 Reference for Purchaser’s Particular Specification (P) 6.8 Scraper Blade Assembly and Support Mechanism 2 Scraper Blade Support Mechanism (S)
7.0 TESTING AND INSPECTION 7.1 General (Clause 1) Type of Test (P) Test Location (P) Witnessing Requirements (P) Test Standard/Specifications (P) Works Site (Y/N) Notice (Days) Visual Inspection (Clause 7.2.1.1) Load testing (Clause 7.2.2.1) Electrical tests (Clause 7.1.2) WIMES 3.04 Site acceptance tests (Section 7.3) Other (specify) 7.3 Site Acceptance Testing 1 Reference for Purchaser’s Particular Specification (P)