Published
90
COB/WSD/E31/02/2026
Single Lot
Competitive Bidding Method
Goods
Zimbabwe PPDPA Act Rules
Procuring Entity Internal Budget Funding
NCEMA PUMP STATION AND CRITERION
Electrical Products: Cables and Materials, Power Back-Up Equipment, Transformers, Standby Generators, Consumables & Accessories,Installation, Repair & Maintenance of Electrical Equipment, Generators, Power Back-Up Equipment & Miscellaneous Electrical Repair Works
60 Day(s)
CITY OF BULAWAYO
17-Jul-2026 01:46 PM
SUPPLY, DELIVERY AND INSTALLATION OF ELECTRIC HOISTS
| Project Name: SUPPLY, DELIVERY AND INSTALLATION OF ELECTRIC HOISTS |
| Description: SUPPLY, DELIVERY AND INSTALLATION OF ELECTRIC HOISTS |
| Item No. | UNSPSC | Lot Name | Lot Description | Quantity | Unit of Measure |
|---|---|---|---|---|---|
| 1 | 24101602 | Hoists | Mobilization of personnel, tools, and equipment to the site | 1 | Lump Sum |
| 2 | 24101602 | Hoists | Erection Tools Cranes, scaffolding, and welding equipment for installation | 1 | Lump Sum |
| 3 | 24101602 | Hoists | Conduct Factory Acceptance Tests (FAT) at manufacturer’s premises (Load test and functional check | 5 | Each |
| 4 | 24101602 | Hoists | Contingencies 5% | 1 | Each |
| 5 | 24101602 | Hoists | Decommission the existing 6 tonne manual hoist and all related accessories | 1 | Lump Sum |
| 6 | 24101602 | Hoists | Supply and install End Carriages Two end trucks with 4 wheels, geared motors, and buffers (IS-2062) | 1 | Pair |
| 7 | 24101602 | Hoists | Supply and install Electric Hoist Trolley 8-Ton capacity, wire rope, gearbox, trolley travelling mechanism, brakes and motor ~10hp 400v 50Hz | 1 | Each |
| 8 | 24101602 | Hoists | Supply and install lifting motor High torque, asynchronous, brake motor (dual speed 7.5 kW to 15 kW 4/16 or 4/12 pole 3-phase motor to provide a high lifting speed (e.g., 6–8 m/min) and a slow creeping speed (e.g., 0.8–1 m/min) | 1 | Each |
| 9 | 24101602 | Hoists | Supply and install reduction gearbox hardened tooth surface, 3-in-1 type, oil bath lubricated or similar | 1 | Each |
| 10 | 24101602 | Hoists | Supply and installation of high-strength galvanized steel wire rope drum (6x37+FC/IWRC), galvanized finish to resist corrosion, ASTM/DIN/ISO standard. Tensile strength 1770-1960 N/mm², 25 MT in a drum or similar standard, galvanised (Includes professional installation, spooling /winding onto the hoist drum, lubricating, and tensioning) for a height of 10m | 15 | Meter |
| 11 | 24101602 | Hoists | Supply and Install forged safety hook with 360-degree rotation and safety latch and all related accessories | 1 | Each |
| 12 | 24101602 | Hoists | Supply and Install (~1.5hp 3phase) Motorized electric double beam trolley with 4- wheel drive gearbox system (2 driven, 2 trailing) for traversing to suit existing rail | 1 | Each |
| 13 | 24101602 | Hoists | Supply and Install on an existing heavy -duty bridge structure (~3kw 3phase) Motorized carriage, 2xBridge drive motors, 2xBridge drive wheels, 2xBridge idler wheels, Bridge rail and all related accessories | 1 | Lump Sum |
| 14 | 24101602 | Hoists | Supply and Install Main Control panel with VFD or contactor-based controls | 1 | Each |
| 15 | 24101602 | Hoists | Supply and Install Power Supply Cable 16mm x 4 core Copper PVC and all related accessories including glands and shrouds | 30 | Meter |
| 16 | 24101602 | Hoists | Supply and install Cable tray 100x50mm and related accessories | 30 | Meter |
| 17 | 24101602 | Hoists | Supply and Install Power Supply Cable 16mm x 5 core Copper PVC flexible trailing cables (650/1100V) with all related accessories. | 20 | Meter |
| 18 | 24101602 | Hoists | Supply and Install 8-way Pendant switch with heavy duty multi core flex control cable with internal steel strain relief wire to prevent pulling tension Hanging, push-button with emergency stop, movable independently and all other related accessories | 10 | Meter |
| 19 | 24101602 | Hoists | Supply and Install DSL System Shrouded Bus Bar System 3PH +N with towing trolley, 100A ~125A aluminium (GI) or copper conductor system 415V/3Ph/50Hz and all the related accessories | 55 | Meter |
| 20 | 24101602 | Hoists | Supply and Install Trolley conductor track, trolley Festoon cable and trolley power cable 5-core (3 phase + neutral + earth) flat cables, 4 mm² to 10 mm² for cross travel with all related accessories | 20 | Meter |
| 21 | 24101602 | Hoists | Supply and Install Pendant Festoon cable, pendant track, 1x Tow Trolley, 1x End Clamp (Fixed), 10-12x Intermediate Cable Trolleys and all related accessories that include Track Joint Brackets, Support Brackets (every 1.5m), End Stops, and Pendant junction box (4x2.5mm2 Flat PVC Cable (standard for 25A) or specific pendant cable with strain relief wire.) | 20 | Meter |
| 22 | 24101602 | Hoists | Supply and Install Isolation Switch (Mounted at floor level, 3P/4P) | 1 | Each |
| 23 | 24101602 | Hoists | Supply and install 5ft fluorescent fittings complete with conduit wiring to the control panel | 20 | Each |
| 24 | 24101602 | Hoists | Supply and install 5ft 55W, energy saving, cool white fluorescent tubes inside the pump house | 20 | Each |
| 25 | 24101602 | Hoists | Supply and Install Safety Devices Final limit switch (top/bottom hook positions), Over-hoist, over-lowering, over-travelling limit switches | 1 | Each |
| 26 | 24101602 | Hoists | Supply and Painting Epoxy-based paint (corrosion-resistant) for structural steel beam | 1 | Lump Sum |
| 27 | 24101602 | Hoists | Test and Commission the whole project | 1 | Lump Sum |
| 28 | 24101602 | Hoists | Provide test certificates Original Equipment Manufacturer (OEM), Operation & Maintenance (O&M) manuals and structural drawings | 1 | Lump Sum |
| 29 | 24101602 | Hoists | Conduct Site Acceptance Tests (SAT) and Commissioning the system (Load testing at 125% capacity) | 1 | Lump Sum |
| 30 | 24101602 | Hoists | Inspection & Certification by authorized Competent Person and provide NSSA certificate | 1 | Each |
| 31 | 24101602 | Hoists | Mobilization of personnel, tools, and equipment to the site | 1 | Lump Sum |
| 32 | 24101602 | Hoists | Conduct Factory Acceptance Tests (FAT) at manufacturer’s premises (Load test and functional check | 5 | Number |
| 33 | 24101602 | Hoists | Erection Tools Cranes, scaffolding, and welding equipment for installation. | 1 | Each |
| 34 | 24101602 | Hoists | Contingencies 5% | 1 | Each |
| 35 | 24101602 | Hoists | Decommission existing 1 tonne manual hoist and all related accessories | 1 | Lump Sum |
| 36 | 24101602 | Hoists | Supply and Install 2 Ton capacity electric hoist, 380V-415V/3Ph/50Hz ~3kw. Lifting height 6-12m, speed 7-8 m/min. Motorised trolley included, complete with motor, gearbox rope, and all related accessories. High torque asynchronous brake motor (dual speed) Class F insulation, IP55, electromagnetic brake, Duty M4/M5 | 1 | Each |
| 37 | 24101602 | Hoists | Supply and Install Reduction gearbox and Drum Hardened tooth surface, compact oil bath lubricated and steel wire rope drum | 1 | Each |
| 38 | 24101602 | Hoists | Supply and Install high strength galvanized steel wire rope (6x36 construction, galvanized, sized for 2Ton load) to ensure high corrosion resistance | 20 | Meter |
| 39 | 24101602 | Hoists | Supply and install Rope Guide/Chain Bag Cast iron rope guide or canvas chain container | 1 | Each |
| 40 | 24101602 | Hoists | Supply and Install forged safety hook with 360-degree rotation and safety latch | 1 | Each |
| 41 | 24101602 | Hoists | Supply and Install Trolley Wheels Machined pressed steel or cast steel, hardened, double flanged to suit existing beam | 2 | Pair |
| 42 | 24101602 | Hoists | Supply and install Trolley Motor Mounted to hoist for monorail travel, fits ISMB I-beam. 04 kW - 1 kW 400v 3phase, speed 20 m/min to suit existing rail. | 1 | Each |
| 43 | 24101602 | Hoists | Supply and install Mainline contactor and transformer housed in IP55 enclosure for Low voltage (24V/36V/48V) for safety1 | 1 | Each |
| 44 | 24101602 | Hoists | Supply and Install Control panel with VFD or contactor-based controls. | 1 | Each |
| 45 | 24101602 | Hoists | Supply and Install 6-button (Up, Down, Forward, Reverse, Emergency Stop, Warning) with heavy duty multi core flex control cable with internal steel strain relief wire to prevent pulling tension and all other related accessories | 1 | Lump Sum |
| 46 | 24101602 | Hoists | Supply and Install Isolation Switch (Mounted at floor level, 3P/4P) | 1 | Each |
| 47 | 24101602 | Hoists | Supply and Install Festoon Cable, 4x 2.5mm2 for moving hoist and all related accessories | 30 | Meter |
| 48 | 24101602 | Hoists | Supply and Install C-Track/I-Beam Rail Galvanized steel C-track for tracking trolleys and support brackets and all related accessories | 30 | Meter |
| 49 | 24101602 | Hoists | Supply and Install 2ton Cable Trolleys Intermediate towing trolleys with swivel hangers and all related accessories | 20 | Each |
| 50 | 24101602 | Hoists | Supply and Install End Clamps Clamps to secure power cable at both ends of track and all related accessories | 2 | Each |
| 51 | 24101602 | Hoists | Supply and Install Power Cable Flexible flat or round cable, 4-core 4mm2, EPR/PVC insulated and all related accessories | 30 | Meter |
| 52 | 24101602 | Hoists | Supply and install 5ft fluorescent fittings complete with conduit wiring to the control panel | 6 | Each |
| 53 | 24101602 | Hoists | Supply and install 5ft 55W, energy saving, cool white fluorescent tubes inside the pump house | 6 | Each |
| 54 | 24101602 | Hoists | Supply and Install Upper/lower travel limit switch, over-load limiter, emergency stop | 1 | Lump Sum |
| 55 | 24101602 | Hoists | Supply and Painting Epoxy-based paint (corrosion-resistant) for structural steel beam | 1 | Lump Sum |
| 56 | 24101602 | Hoists | Provide test certificates Original Equipment Manufacturer (OEM), Operation & Maintenance (O&M) manuals | 1 | Lump Sum |
| 57 | 24101602 | Hoists | Test and Commission the whole project | 1 | Lump Sum |
| 58 | 24101602 | Hoists | Conduct Site Acceptance Tests (SAT) and Commission the system (Load testing at 125% capacity) | 1 | Lump Sum |
| 59 | 24101602 | Hoists | Inspection & Testing by authorized Competent Person and provide NSSA certificate | 1 | Lump Sum |
| 60 | 24101602 | Hoists | Conduct equipment operation training for COB staff | 1 | Lump Sum |
| 61 | 24101602 | Hoists | Decommission existing 2 tonne manual hoist and all related accessories | 1 | Lump Sum |
| 62 | 24101602 | Hoists | Supply and Install Protection Rating (Outdoor) IP55 or higher, incl. rain cover/motor heater | 1 | Lump Sum |
| 63 | 24101602 | Hoists | Supply and Install 2 Ton capacity electric hoist, 380V-415V/3Ph/50Hz ~3kw. Lifting height 6-12m, speed 7-8 m/min. Motorised trolley included, complete with motor, gearbox rope, and all related accessories. High torque asynchronous brake motor (dual speed) Class F insulation, IP55, electromagnetic brake, Duty M4/M5 | 1 | Each |
| 64 | 24101602 | Hoists | Supply and Install Reduction gearbox and Drum Hardened tooth surface, compact oil bath lubricated and steel wire rope drum | 1 | Each |
| 65 | 24101602 | Hoists | Supply and Install high strength galvanized steel wire rope (6x36 construction, galvanized, sized for 2Ton load) to ensure high corrosion resistance | 20 | Meter |
| 66 | 24101602 | Hoists | Supply and install Rope Guide/Chain Bag Cast iron rope guide or canvas chain container | 1 | Each |
| 67 | 24101602 | Hoists | Supply and Install forged safety hook with 360degree rotation and safety latch | 1 | Each |
| 68 | 24101602 | Hoists | Supply and Install Trolley Wheels Machined pressed steel or cast steel, hardened, double flanged to suit existing beam | 2 | Pair |
| 69 | 24101602 | Hoists | Supply and install Trolley Motor Mounted to hoist for monorail travel, fits ISMB I-beam. 04 kW - 1 kW 400v 3phase, speed 20 m/min to suit existing rail. | 1 | Each |
| 70 | 24101602 | Hoists | Supply and install Mainline contactor and transformer housed in IP55 enclosure for Low voltage (24V/36V/48V) for safety | 1 | Each |
| 71 | 24101602 | Hoists | Supply and Install Control panel with VFD or contactor-based controls. | 1 | Each |
| 72 | 24101602 | Hoists | Supply and Install 6-button (Up, Down, Forward, Reverse, Emergency Stop, Warning) with heavy duty multi core flex control cable with internal steel strain relief wire to prevent pulling tension and all other related accessories | 1 | Meter |
| 73 | 24101602 | Hoists | Supply and Install Isolation Switch (Mounted at floor level, 3P/4P) | 1 | Each |
| 74 | 24101602 | Hoists | Supply and Install Festoon Cable, 4x 2.5mm2 for moving hoist and all related accessories | 30 | Each |
| 75 | 24101602 | Hoists | Supply and Install C-Track/I-Beam Rail Galvanized steel C-track for tracking trolleys | 30 | Meter |
| 76 | 24101602 | Hoists | Supply and Install Cable Trolleys Intermediate towing trolleys with swivel hangers | 30 | Each |
| 77 | 24101602 | Hoists | Supply and Install End Clamps Clamps to secure power cable at both ends of track. | 2 | Each |
| 78 | 24101602 | Hoists | Supply and Install Power Cable Flexible flat or round cable, 4-core, EPR/PVC insulated. | 30 | Each |
| 79 | 24101602 | Hoists | Supply and Install Upper/lower travel limit switch, over-load limiter, emergency stop | 1 | Each |
| 80 | 24101602 | Hoists | Supply and Painting Epoxy-based paint (corrosion-resistant) for structural steel beam | 1 | Each |
| 81 | 24101602 | Hoists | Provide test certificates Original Equipment Manufacturer (OEM), Operation & Maintenance (O&M) manuals and structural drawings | 1 | Lump Sum |
| 82 | 24101602 | Hoists | Test and Commission the whole project | 1 | Lump Sum |
| 83 | 24101602 | Hoists | Conduct Site Acceptance Tests (SAT) and Commissioning the system (Load testing at 125% capacity) | 1 | Lump Sum |
| 84 | 24101602 | Hoists | Inspection & Testing by authorized Competent Person and provide NSSA certificate | 1 | Lump Sum |
| 85 | 24101602 | Hoists | Conduct equipment operation training for COB staff | 1 | Lump Sum |
| 86 | 24101602 | Hoists | Decommission existing 1/2 tonne manual hoist and all related accessories | 1 | Lump Sum |
| 87 | 24101602 | Hoists | Supply and Install 1 Ton capacity electric hoist, 380V-415V/3Ph/50Hz ~2kw. Lifting height 6-12m, speed 7-8 m/min. Motorised trolley included, complete with motor, gearbox rope, and all related accessories. High torque asynchronous brake motor (dual speed) Class F insulation, IP55, electromagnetic brake, Duty M4/M5 | 1 | Each |
| 88 | 24101602 | Hoists | Supply and Install Reduction gearbox and Drum Hardened tooth surface, compact oil bath lubricated and steel wire rope drum | 1 | Each |
| 89 | 24101602 | Hoists | Supply and Install high strength galvanized steel wire rope (6x36 construction, galvanized, sized for 1Ton load) to ensure high corrosion resistance | 20 | Meter |
| 90 | 24101602 | Hoists | Supply and install Rope Guide/Chain Bag Cast iron rope guide or canvas chain container | 1 | Each |
| 91 | 24101602 | Hoists | Supply and Install forged safety hook with 360-degree rotation and safety latch | 1 | Each |
| 92 | 24101602 | Hoists | Supply and Install Trolley Wheels Machined pressed steel or cast steel, hardened, double flanged to suit existing beam | 2 | Pair |
| 93 | 24101602 | Hoists | Supply and install Trolley Motor Mounted to hoist for monorail travel, fits ISMB I-beam. 0.4 kW – 0.8 kW 400v 3phase, speed 20 m/min to suit existing rail. | 1 | Each |
| 94 | 24101602 | Hoists | Supply and install Mainline contactor and transformer housed in IP55 enclosure for Low voltage (24V/36V/48V) for safety | 1 | Each |
| 95 | 24101602 | Hoists | Supply and Install Control panel with VFD or contactor-based controls. | 1 | Each |
| 96 | 24101602 | Hoists | Supply and Install 6-button (Up, Down, Forward, Reverse, Emergency Stop, Warning) with heavy duty multi core flex control cable with internal steel strain relief wire to prevent pulling tension and all other related accessories | 1 | Each |
| 97 | 24101602 | Hoists | Supply and Install Isolation Switch (Mounted at floor level, 3P/4P) | 1 | Each |
| 98 | 24101602 | Hoists | Supply and Install Festoon Cable, 4x 2.5mm2 for moving hoist and all related accessories. | 30 | Meter |
| 99 | 24101602 | Hoists | Supply and Install C-Track/I-Beam Rail Galvanized steel C-track for tracking trolleys and support brackets and all related accessories | 30 | Meter |
| 100 | 24101602 | Hoists | Supply and Install Cable Trolleys Intermediate towing trolleys with swivel hangers and all related accessories | 20 | Each |
| 101 | 24101602 | Hoists | Supply and Install End Clamps Clamps to secure power cable at both ends of track and all related accessories | 2 | Each |
| 102 | 24101602 | Hoists | Supply and Install Power Cable Flexible flat or round cable, 4-core 4mm2, EPR/PVC insulated and all related accessories | 30 | Each |
| 103 | 24101602 | Hoists | Supply and install 5ft fluorescent fittings complete with conduit wiring to the control panel | 6 | Each |
| 104 | 24101602 | Hoists | Supply and install 5ft 55W, energy saving, cool white fluorescent tubes inside the pump house | 6 | Each |
| 105 | 24101602 | Hoists | Supply and Install Upper/lower travel limit switch, over-load limiter, emergency stop | 1 | Each |
| 106 | 24101602 | Hoists | Supply and Painting Epoxy-based paint (corrosion-resistant) for structural steel beam | 1 | Each |
| 107 | 24101602 | Hoists | Provide test certificates Original Equipment Manufacturer (OEM), Operation & Maintenance (O&M) manuals | 1 | Lump Sum |
| 108 | 24101602 | Hoists | Test and Commission the whole project | 1 | Lump Sum |
| 109 | 24101602 | Hoists | Conduct Site Acceptance Tests (SAT) and Commission the system (Load testing at 125% capacity) | 1 | Lump Sum |
| 110 | 24101602 | Hoists | Inspection & Testing by authorized Competent Person and provide NSSA certificate | 1 | Lump Sum |
| 111 | 24101602 | Hoists | Conduct equipment operation training for COB staff | 1 | Lump Sum |
| 112 | 24101602 | Hoists | Mobilization of personnel, tools, and equipment to the site | 1 | Lump Sum |
| 113 | 24101602 | Hoists | Erection Tools Cranes, scaffolding, and welding equipment for installation. | 1 | Lump Sum |
| 114 | 24101602 | Hoists | Contingencies 5% | 1 | Each |
| 115 | 24101602 | Hoists | Supply and Install 3 Ton capacity electric hoist, 380V-415V/3Ph/50Hz ~3kw. Lifting height 6-12m, speed 5.4 m/min. Motorised trolley included, complete with motor, gearbox rope, and all related accessories. High torque asynchronous brake motor) Class F insulation, IP55, electromagnetic brake, Duty M4/M5 | 1 | Each |
| 116 | 24101602 | Hoists | Supply of Motorized Trolley unit for single beam, including travel motor, gearbox, and wheels. | 1 | Lump Sum |
| 117 | 24101602 | Hoists | Supply and Install Reduction gearbox and Drum Hardened tooth surface, compact oil bath lubricated and steel wire rope drum | 1 | Each |
| 118 | 24101602 | Hoists | Supply and Install high strength galvanized steel wire rope (6x36 construction, galvanized, sized for 3Ton load) or alloy steel load chain (Grade G80/G100) for 12m lift height to ensure high corrosion resistance | 20 | Meter |
| 119 | 24101602 | Hoists | Supply and install Rope Guide/Chain Bag Cast iron rope guide or canvas chain container | 1 | Each |
| 120 | 24101602 | Hoists | Supply and Install forged safety hook with 360-degree rotation and safety latch | 1 | Each |
| 121 | 24101602 | Hoists | Supply and Install Trolley Wheels Machined pressed steel or cast steel, hardened, double flanged to suit existing beam | 2 | Pair |
| 122 | 24101602 | Hoists | Supply and install Trolley Motor Mounted to hoist for monorail travel, fits ISMB I-beam. 04 kW - 1 kW 400v 3phase, speed 20 m/min to suit existing rail. | 1 | Each |
| 123 | 24101602 | Hoists | Supply and install Mainline contactor and transformer housed in IP55 enclosure for Low voltage (24V/36V/48V) for safety | 1 | Each |
| 124 | 24101602 | Hoists | Supply and Install Control panel with VFD or contactor-based controls. | 1 | Each |
| 125 | 24101602 | Hoists | Supply and Install 6-button (Up, Down, Forward, Reverse, Emergency Stop, Warning) with heavy duty multi core flex control cable with internal steel strain relief wire to prevent pulling tension and all other related accessories | 1 | Lump Sum |
| 126 | 24101602 | Hoists | Integrated safety components Upper/lower limit switches, overload protection (safety clutch or electronic), and emergency stop. | 1 | Each |
| 127 | 24101602 | Hoists | Supply and install a set of heavy-duty current collectors with carbon brushes, specifically compatible with existing circular conductors for reliable power pickup. | 60 | Lump Sum |
| 128 | 24101602 | Hoists | Supply and install a lockable, visible isolator switch rated for motor circuits (per NEC guidelines) installed near the beam for maintenance safety. | 1 | Each |
| 129 | 24101602 | Hoists | Supply and install 5ft fluorescent fittings complete with conduit wiring to the control panel | 6 | Lump Sum |
| 130 | 24101602 | Hoists | Supply and install 5ft 55W, energy saving, cool white fluorescent tubes inside the pump house | 6 | Each |
| 131 | 24101602 | Hoists | Supply and Install DSL System Shrouded Bus Bar System 3PH +N with towing trolley, 100A ~125A aluminium (GI) or copper conductor system 415V/3Ph/50Hz and all the related accessories | 240 | Meter |
| 132 | 24101602 | Hoists | Painting | 1 | Lump Sum |
| 133 | 24101602 | Hoists | Supply and Painting Epoxy-based paint (corrosion-resistant) for structural steel beam | 1 | Lump Sum |
| 134 | 24101602 | Hoists | Testing and Commissioning (FAT & SAT) & documentation | 1 | Lump Sum |
| 135 | 24101602 | Hoists | On-site installation of the hoist and trolley onto the existing single beam, including alignment and mechanical assembly. | 1 | Lump Sum |
| 136 | 24101602 | Hoists | Conduct Electrical wiring, earthing, and integration with existing power infrastructure. | 1 | Lump Sum |
| 137 | 24101602 | Hoists | Test Continuity & Grounding Test Verification that the hoist frame and trolley are effectively grounded, ensuring no fault current returns through the beam or load | 1 | Lump Sum |
| 138 | 24101602 | Hoists | Testing and Commissioning, including no-load, full-load (3 Ton), and overload (125%) performance and brake tests. | 1 | Lump Sum |
| 139 | 24101602 | Hoists | Provide test certificates Original Equipment Manufacturer (OEM), Operation & Maintenance (O&M) manuals | 1 | Lump Sum |
| 140 | 24101602 | Hoists | Inspection & Testing by authorized Competent Person and provide NSSA certificate | 1 | Lump Sum |
| 141 | 24101602 | Hoists | Conduct equipment operation training for COB staff | 1 | Lump Sum |