U-frame desk base, cast iron and varnished steel Ø 34 mm
Shipping and Delivery
Shipping and Delivery
| Product Type | Delivery Method | Preparation Time | Transport Time | Delivery Time |
|---|---|---|---|---|
| All Parts | Pickup Point | 0 to 3 days | 3 to 6 days | 3 to 9 days |
| All Parts | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 90cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes < 200cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 200cm | Home Delivery | 0 to 6 days | 6 to 10 days | 6 to 16 days |
| Assembled Products | Home Delivery & Pickup Point | 0 to 5 days | (see methods) | 3 to 11 days |
* Tubes longer than 90cm cannot be delivered to a pickup point
For confirmation of delivery times on specific items, please send us a message
U-frame desk base, cast iron and varnished steel Ø 34 mm
The U-frame desk base, in Ø 34 mm pipe
This is the intermediate version of our desk base: the black steel pipe moves up to 1 inch, i.e. 34 mm outside diameter, and the base gains stiffness on the wide sizes without losing its line. The principle remains that of the U: four legs at the corners, two side rails and a single tie bar, at the back and up high, which leaves the underside of the desk entirely free. Base height 72.5 cm, i.e. 75 cm with a 25 mm top. Fifteen sizes, from 82 × 52 to 162 × 72 cm.
Top not included. This base is sold on its own: you fit the top of your choice (wood, glass, worktop).
Malleable cast iron and 1 inch steel, screwed by hand
Two tees at the front, two 4-way distributors at the back: the latter hold both the side rails and the rear bar. A long pipe rises from each foot socket to its fitting, a short pipe joins the flange that holds the top. Fully threaded assembly, no welding, put together in Annecy and fully demountable.
Choosing your size
The size follows from the top: 8 to 15 cm of overhang on each side in width, 4 to 8 cm in depth. The 112 × 52 cm takes a 120 × 60 desk, the 132 × 62 cm a 140 × 70 top, the 162 × 72 cm a 180 × 80 worktop. With this diameter the base is stiff enough for long tops without thickening the silhouette.
The height is fixed: 72.5 cm for the base alone. Add the thickness of your top to get the final height — 72.5 + 2.5 cm = 75 cm, 72.5 + 4 cm = 76.5 cm. The office desk standard (EN 527-1) sets a fixed worktop at 74 cm, give or take 2 cm: a 2 to 4 cm top puts you right in that range.
The rail sits high. The two side rails and the rear bar run 54.9 cm above the floor, 17.5 cm below the top: nothing at foot level, the vacuum cleaner passes and the chair rolls freely. The rear bar, against the wall, doubles as a rail for the power strip and cables.
Tabletop thickness depends on the span between the legs. Up to the 102 × 72 cm size, 18 mm plywood is enough; from 112 × 52 cm upwards, allow 27 mm solid wood or the equivalent. These figures correspond to a deflection below 1/300 of the span under a 100 kg/m² load — the dimensions table gives the detail for every size.
Key features
Available in 15 versions, to be chosen above: footprint from 82 × 52 cm to 162 × 72 cm, base height 72 cm.
| Pipes | black steel 1" (26 × 34), giving an outside diameter of 34 mm — see the table of steel pipe diameters |
|---|---|
| Materials | malleable cast iron fittings, black steel pipes (black or galvanised steel?) |
| Finish | clear varnish applied to the cast iron and the steel alike, leaving the raw metal visible |
| Colour | Grey / anthracite grey depending on the light |
| Tabletop | not included — the Ø 75 mm flanges are drilled with 3 holes to screw on the tabletop of your choice, wood or glass (choosing a floor flange) |
| Flange spacing (centre-to-centre) | approximately the dimension minus 7.5 cm, in length as well as in depth |
| Floor protection | black plastic inserts under each leg |
| Assembly | delivered part-assembled — a few fittings to screw together on arrival (how to screw threaded fittings together), then fix your tabletop to the flanges |
| Weight | 12.8 to 15.9 kg depending on the version (table below) |
The same base, other pipe diameters
This desk frame comes in three pipe diameters: Ø 27 mm, Ø 34 mm (this page) and Ø 42 mm. The thicker the pipe, the heavier, steadier and bolder the base; the thinner it is, the more discreet the silhouette. For a dining table or a console, look instead at the H-frame base at table height.
Details and features
A clear varnish protects the cast iron and the steel while leaving the raw look of the metal visible. Wipe it with a dry cloth; avoid water and abrasive cleaners. Indoor use only.
Pictures featuring a tabletop are staged; only the base is sold.
Slight variations in shade or surface are normal on cast parts: they belong to the raw, authentic character of Home Invasion products, and make every base one of a kind.
Built to order in our workshop in Annecy, France.
Detailed dimensions
The letters refer to the drawings below. All dimensions in centimetres; dimension A is measured from the outer edge of one flange to the opposite flange. Centre distances (B, D) are measured between flange centres — useful for drilling the top.
Tolerance: these are nominal dimensions. How far each fitting is tightened, together with casting tolerances, gives about ± 5 mm of variation on each dimension. Measure the base once assembled before drilling your tabletop or having it cut.
Side view, along the length — indicative drawing, dimensions in the table
Top view — indicative drawing, dimensions in the table
| Size | A – overall length | B – centre distance (length) | C – overall depth | D – centre distance (depth) | Min. tabletop thickness |
|---|---|---|---|---|---|
| 82 × 52 cm | 81.7 | 74.2 | 51.7 | 44.2 | 18 mm plywood |
| 82 × 62 cm | 81.7 | 74.2 | 61.7 | 54.2 | 18 mm plywood |
| 92 × 52 cm | 91.7 | 84.2 | 51.7 | 44.2 | 18 mm plywood |
| 92 × 62 cm | 91.7 | 84.2 | 61.7 | 54.2 | 18 mm plywood |
| 102 × 52 cm | 101.7 | 94.2 | 51.7 | 44.2 | 18 mm plywood |
| 102 × 62 cm | 101.7 | 94.2 | 61.7 | 54.2 | 18 mm plywood |
| 102 × 72 cm | 101.7 | 94.2 | 71.7 | 64.2 | 18 mm plywood |
| 112 × 52 cm | 111.7 | 104.2 | 51.7 | 44.2 | 27 mm solid wood |
| 112 × 62 cm | 111.7 | 104.2 | 61.7 | 54.2 | 27 mm solid wood |
| 112 × 72 cm | 111.7 | 104.2 | 71.7 | 64.2 | 27 mm solid wood |
| 132 × 52 cm | 131.7 | 124.2 | 51.7 | 44.2 | 27 mm solid wood |
| 132 × 62 cm | 131.7 | 124.2 | 61.7 | 54.2 | 27 mm solid wood |
| 132 × 72 cm | 131.7 | 124.2 | 71.7 | 64.2 | 27 mm solid wood |
| 162 × 62 cm | 161.7 | 154.2 | 61.7 | 54.2 | 27 mm solid wood |
| 162 × 72 cm | 161.7 | 154.2 | 71.7 | 64.2 | 27 mm solid wood |
| E – overall height | F – height to rail centreline |
|---|---|
| 72.5 | 54.9 |
Weight of the packed base:
| Size | Weight |
|---|---|
| 82 × 52 cm | 12.8 kg |
| 82 × 62 cm | 13.3 kg |
| 92 × 52 cm | 13.1 kg |
| 92 × 62 cm | 13.6 kg |
| 102 × 52 cm | 13.3 kg |
| 102 × 62 cm | 13.8 kg |
| 102 × 72 cm | 14.3 kg |
| 112 × 52 cm | 13.6 kg |
| 112 × 62 cm | 14.1 kg |
| 112 × 72 cm | 14.6 kg |
| 132 × 52 cm | 14.0 kg |
| 132 × 62 cm | 14.5 kg |
| 132 × 72 cm | 15.0 kg |
| 162 × 62 cm | 15.4 kg |
| 162 × 72 cm | 15.9 kg |
For cutting the tabletop and fixing it to the flanges, our tutorial building an industrial-style desk from plumbing pipe takes you through it step by step.
Would you rather build it yourself?
Nothing here is welded: two tees, two distributors, four flanges, four sockets and eleven threaded pipes, screwed into one another. Every part can be ordered individually from our catalogue, and the pipe lengths are standard references, not special cuts.
The parts of one base:
Pipe lengths, cart and 3D view by size:
| Size | Pipes to order | Cart | 3D view |
|---|---|---|---|
| 82 × 52 cm | 4 × 150 mm, 2 × 400 mm, 4 × 500 mm, 1 × 700 mm | Add the 23 parts | Open the configurator |
| 82 × 62 cm | 4 × 150 mm, 6 × 500 mm, 1 × 700 mm | Add the 23 parts | Open the configurator |
| 92 × 52 cm | 4 × 150 mm, 2 × 400 mm, 4 × 500 mm, 1 × 800 mm | Add the 23 parts | Open the configurator |
| 92 × 62 cm | 4 × 150 mm, 6 × 500 mm, 1 × 800 mm | Add the 23 parts | Open the configurator |
| 102 × 52 cm | 4 × 150 mm, 2 × 400 mm, 4 × 500 mm, 1 × 900 mm | Add the 23 parts | Open the configurator |
| 102 × 62 cm | 4 × 150 mm, 6 × 500 mm, 1 × 900 mm | Add the 23 parts | Open the configurator |
| 102 × 72 cm | 4 × 150 mm, 4 × 500 mm, 2 × 600 mm, 1 × 900 mm | Add the 23 parts | Open the configurator |
| 112 × 52 cm | 4 × 150 mm, 2 × 400 mm, 4 × 500 mm, 1 × 1000 mm | Add the 23 parts | Open the configurator |
| 112 × 62 cm | 4 × 150 mm, 6 × 500 mm, 1 × 1000 mm | Add the 23 parts | Open the configurator |
| 112 × 72 cm | 4 × 150 mm, 4 × 500 mm, 2 × 600 mm, 1 × 1000 mm | Add the 23 parts | Open the configurator |
| 132 × 52 cm | 4 × 150 mm, 2 × 400 mm, 4 × 500 mm, 1 × 1200 mm | Add the 23 parts | Open the configurator |
| 132 × 62 cm | 4 × 150 mm, 6 × 500 mm, 1 × 1200 mm | Add the 23 parts | Open the configurator |
| 132 × 72 cm | 4 × 150 mm, 4 × 500 mm, 2 × 600 mm, 1 × 1200 mm | Add the 23 parts | Open the configurator |
| 162 × 62 cm | 4 × 150 mm, 6 × 500 mm, 1 × 1500 mm | Add the 23 parts | Open the configurator |
| 162 × 72 cm | 4 × 150 mm, 4 × 500 mm, 2 × 600 mm, 1 × 1500 mm | Add the 23 parts | Open the configurator |
The assembled base, for its part, arrives varnished, checked and fitted with its floor-protection inserts, which are not sold separately.
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