Shutting a site down for Christmas — and opening it again safely

The Christmas shutdown is the longest period in the year when a construction site is left alone, and it falls in the fortnight most likely to bring named storms, standing water and a hard frost. Everything on site stays where it was on the last afternoon — excavations, temporary works, stacked material, plant — and nobody looks at any of it for two weeks.

The seasonal basics of working through the dark months are covered in winter working when the clocks go back. This is about the two days either side of the break, which are a different problem.

What the weather does to a site nobody is watching

An excavation that was safe on the twenty-third is not necessarily safe on the fourth. Rain softens the ground, a freeze and thaw loosens a face, and spoil that was clear of the edge creeps towards it under its own weight. The condition of a dig is a property of the day rather than of the digging, which is why the inspection regime exists at all — and two weeks is a long time for a face to be unobserved.

Temporary works are the other category that does not look after itself. Props, falsework and anything supporting a structure were designed against a set of conditions, and wind loading on a part-clad frame over a fortnight of storms is a condition worth thinking about before the gate is locked rather than after. If you have a coordinator, this is their decision rather than the site manager's — the distinction is in temporary works and the coordinator's role.

Securing against wind, not just against theft

Most shutdown checklists are written around security: lock the compound, chain the plant, take the fuel. All of that matters and none of it addresses the thing that actually causes damage, which is wind getting under something.

• –Hoarding and temporary fencing — braced and tied rather than freestanding, because a run of Heras in a gale is a line of falling panels onto whatever is beside it
• –Sheeting, netting and banners — secured properly or removed; a torn sheet loads the structure it is fixed to
• –Stacked and palleted material — strapped, down low, and not somewhere a gust can take a sheet of ply off the top
• –Site cabins and drying rooms — doors and windows secured, heaters off at the isolator rather than at the switch
• –Skips and waste — emptied before the break, because a full open skip is both a fire risk and a source of airborne debris
• –Scaffolds — their own pre-shutdown walk, with ties and sheeting the priorities
• –Excavations — covered, barriered and pumped where needed, with the barrier fixed rather than resting

The one most often missed is the last-minute delivery. Material that arrives on the final afternoon is landed wherever there is room, by people who are finishing up, and nobody puts it away. It spends the break stacked in the open, frequently on an access route.

The site diary is worth more than usual this week

The weeks either side of Christmas generate more disputes about delay than any other period in the year, and the only thing that settles them is what was written down at the time. The site diary matters most in the days nothing happens — conditions, who was on site, what was delivered, what was stopped and why. A diary with the wet days in it and not the dry ones is an argument rather than a record, which is the point made in what to include in a daily record.

The restart is the dangerous half

Reopening gets far less planning than closing and deserves more. It happens in the dark, often with agency labour covering for people still on leave, on a site that has changed since anybody last walked it, with a programme that has lost a fortnight and a client who wants it back.

Three things are worth insisting on. A full site inspection before anybody works — not a look round, a walk with the sheet. Re-induction for anybody new, and a reminder for everybody else, because the site they left is not quite the site they are returning to. And a check that the statutory inspections that fell due over the break have actually been done: scaffolds, excavations, lifting equipment, plant that has stood in the wet for two weeks.

Plant is the quiet one. Machines that have been standing in freezing conditions do not always start, and the ones that do have been sitting with water in places it should not be. Pre-use checks on the first morning back are worth doing properly rather than at the usual pace — the relevant regimes are set out in LOLER and PUWER inspections.