Polishing podium and multi-storey commercial slabs is a logistics problem before it is a finishing problem: decks sit over retail, parking or occupied space, machines and dust move between levels, and several trades share the same schedule. Delivery turns on zone partition, vertical transfer, joint and shade control, and the overlap with later fit-out. Figures are planning targets; final limits follow the specification.

Scope: decks over retail, parking or occupied space

Walk each deck with the owner rep and structural engineer before pricing: slab type, topping, joints and loads carried below. A podium slab is often a 120-200 mm structural deck with a 40-80 mm bonded topping; confirm cover depth near columns and ducts so metal phases do not cut reinforcement. Surface temperature 10-30 C and RH below 75-80% are required before densifier. Vibration, dust and water over a fit-out room are treated differently from an open parking level; flag cracks and spalls, and agree repair method and grind depth before mobilization.

Zone partition and pedestrian and vehicle corridor layout

Divide each deck into work zones before tooling arrives, and fix the corridor for crews, machines and waste. A typical zone runs 200-400 m2; keep one clear walkway 1.2-1.5 m wide for pedestrians and a separate machine route where space allows. Seal zones from public corridors with sheeting on 2.0-2.4 m frames, and agree which elevators or stair cores carry equipment and at what hours. Finish the deepest occupied zone first and leave shared circulation for last, so crews do not cross a finished floor.

Machine hoisting and vertical transfer between levels

Confirm machine weight and size against the lift path early: a walk-behind grinder commonly weighs 250-450 kg, plus dust extractor and trolley. Use a freight elevator, hoist or stair-dolly route agreed in writing, with landing protection on every intermediate level. Check machine footprint against door openings and stair turns; where a full-size unit cannot fit, plan compact heads and hand-held edge tools. Protect lift interiors and clean the route after each transfer.

• Weight: list machine, extractor and trolley against elevator or hoist capacity before booking the window.
• Route: agree the stair or elevator path and the person who clears each intermediate landing.
• Schedule: book transfer outside peak delivery hours, with a 2-3 day buffer per deck.
• Dust: keep the extractor running on landings; wipe machine wheels before entering a finished level.
• Access: identify decks needing compact or hand-held tools and plan them in advance.

Joint layout, saw-cut timing and slab movement

Joint layout controls both cracking and the polished finish. Saw-cut control joints within 6-24 h of pour while concrete earns strength; spacing typically runs 3-4.5 m, cut depth about one quarter of slab thickness. Record joint location, spacing and timing on the deck record. Polishing cannot close a joint that opens later; seal or refill saw cuts after grinding per spec. Check curling, shrinkage cracks and delamination before resin phases, since these show through a CSP 5-7 finish.

Color and shade consistency across pours and decks

Shade varies between pours, batches and decks because paste, curing residue and patch mortar differ. Match each deck to the approved mock-up, at least 3 x 3 m on site, recording CSP, 60-degree gloss, exposure and tone. If a pour varies, set grind depth to the lighter bay rather than cutting unevenly. Run the standard sequence: metal bond 16/20/30/40, resin 100/200/400/800/1500, with 3000 where a mirror read is specified, and do not skip resin steps. Densifier dilution stays consistent deck to deck: 1:64 (about 15 ml/L) neat and 1:128 (about 8 ml/L) ready-use, reacted 20-40 min.

Sequencing and schedule overlap with finishing trades

Podium work rarely closes a deck to all trades at once. Agree the overlap in writing: our zones, parallel ceilings, partitions and MEP, and who moves first on a conflict. Leave a 2-3 day buffer per deck between grinding completion and densifier or sealer, and protect finished zones from later traffic with sheeting and mats. Heavy MEP work that cuts the slab should precede our final resin pass. Track handovers deck by deck: each deck gets its own walk-through, defect list and correction date.

Acceptance per deck and handover records

Define acceptance before mobilization and run it deck by deck against the mock-up. Read 60-degree gloss on a grid, one point every 10-15 m2; adjacent areas differ by up to 5 gloss units and stay acceptable, while a gap above 15 units triggers rework. Slip checks follow the spec: dry PTV at least 36, wet PTV 10-20 points lower, DCOF at least 0.42. Inspect each zone under 300-500 lux raking light at 15-30 degrees, photograph flagged patches, and log moisture, grit and readings. The package keeps zone drawings, joint timing, gloss and slip tests and signed walk-throughs.

Common disputes: delay, dust, vibration and noise

Most podium disputes are organizational rather than finish defects. Delay claims come from unclear lift windows and zone access; settle transfer times and buffers in writing before mobilization. Dust complaints come from crossing finished corridors or unsealed landings; keep routes dedicated and cleaned after each transfer. Vibration and noise over occupied space need the loudest metal phases scheduled to agreed hours. Scratches from later trades are avoided by protecting finished decks and recording a baseline walk-through before fit-out equipment arrives.