Mr Pieter Botha
Gallery floor loads
What we check before a foyer plinth lands on older boards.
Every time we bring a Foyer Plinth into a gallery or lodge, I take a careful look at the floor before anything touches down. You get all kinds in South Africa, from proud old stinkwood boards in the Winelands to Karoo pine strip over trusses that have seen better days, so I’ve learnt not to assume a floor will play along.
Read it alongside the Foyer Plinth page.
Reading the boards
First thing, I check what the floor is made of. Most of the time we’re dealing with hardwood, yellowwood, Oregon pine, sometimes teak, but plenty of Joburg and Cape spaces have layers of spruce or even old chipboard hidden under the carpets. The Foyer Plinth is 400 by 400 on top and stands at 900 millimetres tall, so its weight isn’t wild, but concentrated. I tap along the landing spot with a knuckle or a rubber mallet. A solid, dry thud usually means a good substructure. A hollow or springy sound makes me wary. I once came across a Rosebank gallery where someone had covered a rotten patch with a loose tile, that could have sent a sculpture right through if we hadn’t spotted it.
Boards that have cupped or shrunk can also trip us up. A gap between boards lets a foot or edge sit unevenly, especially with a brass foot like on our plinths. That can throw the whole piece off balance, and on Heritage floors we can’t just screw in bracing or pop in a wedge without the owner’s say-so.
Assessing load spread and compression
I carry a proper straight-edge to check for local dips or high spots, as a 30 kilogram load over a 160 000 square millimetre base is still enough pressure to indent softer timbers. In Joburg, some old floors have a lovely give, but too much and you’ll see the plinth lean ever so slightly, not good for delicate ceramic editions or tall bronzes. We sometimes slip a thin cork pad under the brass foot to spread the load, but only if it won’t show. Durban humidity is another thing: boards can swell and close gaps, yet next dry spell, they shrink back and the plinth may wobble.
It’s worth noting that even though oiled hardwood is forgiving for the plinth itself, the floor finish underneath might not be. French polish or old waxed boards will mark if you drag, so we always lift and place, never push.
- Check the subfloor for movement or bounce.
- Identify type of wood and finish, pine dents more easily than teak.
- Look for existing cracks, gaps or insect damage under where the plinth will stand.
- Test level with a straight-edge ruler over the full 400 x 400 area.
- Lift to reposition. Never slide the plinth over polished or waxed boards.
Mistakes and remedies from the field
A common misstep is trusting that a newly restored floor means strong support. I’ve seen fresh pine overlays, especially in some Cape flats, which flex under heavier plinths, that creaking is your warning. A heavy sculpture once toppled after a client moved the plinth onto a barely-supported corner of a room. Now, if I spot a suspicious patch, I ask for permission to lift a board or look underneath from the basement or crawlspace.
For long-term display, I sometimes recommend a temporary underlay board, painted to match the skirting, which spreads the weight across more boards. This isn’t pretty, but it saves heartache and floor repairs later. If the client wants to move the plinth around often, I advise using felt pads, but only the kind that won’t trap grit, sand under those is a recipe for scratches, especially with the Cape southeaster blowing dust in.
Communication and sign-off
Before any installation, I send a quick summary to the venue’s facilities team or owner, especially if I’ve seen anything that needs attention. If there’s real doubt about the bearing capacity, I get in touch with a local carpenter or building inspector. It’s easier to delay a week than to risk a cracked board or worse. We always keep a record of what we checked, including photos of any questionable patches, so there’s no confusion later.
If you’re not sure whether your floor is up to it, or need guidance on prepping a landing spot for a Foyer Plinth, you’re welcome to email atelier@creationafrica.co.za for practical advice or a site visit. It’s often the small things, a loose tongue, a hidden old nail, a spot of borer, that make the difference between a smooth install and a call-back.
Where to go next
See the Foyer Plinth specs, then the install notes. For a full room brief, the Foyer commission or Museum edition studio pages walk through a visit week. Finish samples live under finishes, and you can book a sample hour at a showroom.