Hall 10 × 30: the anatomy of the most requested size — sections, mass, price, permits
Ten times thirty metres — three hundred square metres — is the most frequent size we are asked about: large enough for a serious warehouse, a machine shop or a smaller plant, small enough to stay within a reasonable budget. Instead of general sentences, we have dissected our own standard hall: which sections carry it, why exactly those, what one structural type covers — and two legal facts on which, at this very size, both the timescale and the paperwork depend.
The anatomy of the structure, element by element
| Element | Section / quantity | Why exactly so |
|---|---|---|
| Columns | IPE 330 · 12 pcs | They carry the peak moment of the frame — which is why they are “oversized” in relation to the rafter. A pinned bearing at the foundation simplifies the foundation work. |
| Rafters (roof beams) | IPE 240 + haunch up to 500 mm | The haunch strengthens the rafter-to-column connection exactly where the moment is greatest, so away from the connection the rafter may be two sizes smaller. |
| Frames | 6 frames · spacing 6.0 m | Over a length of 30 m that makes 5 bays. The spacing of 6 m is the European standard for standard halls — the purlins are tuned to it as well. |
| Struts | CHS 76.1×3.2 and 88.9×4 | Tubes that connect the frames along the length of the hall and hold them stable out of their own plane. |
| Bracings | flat steel 50×8 and 70×8 | Diagonal ties in the roof and in the wall — they take the wind on the gable and stiffen the roof plane. |
| Roof purlins | Z profile 2 mm · ~356 m · @1 m | They carry the roof covering and transfer the load to the rafters. Wall purlins depend on the choice of cladding, so they go with the envelope, not with the structure. |
| Material and protection | S235 · anti-corrosion painting | Primer + top coat. The mass includes the standard allowance of 3 % for welds. |
This combination — a strong column, a slimmer rafter, a haunch at the connection — is the classic school of the portal frame with a pinned bearing at the foundation. It is neither penny-pinching nor overkill: the moment is taken where it arises, and the foundation stays simple.
A mass you can check for yourself
The total mass of the primary structure in the calculation is 7,438 kg. That figure can be checked with schoolroom arithmetic: 12 IPE 330 columns (49.1 kg/m) at a height of 5 m give ~2,950 kg; IPE 240 rafters (30.7 kg/m) over 6 frames ~1,870 kg; the rest is the haunches, the gusset and base plates, the struts and the bracings. Once it is all added up with the allowance for welds, the sum settles into the calculation — and that is exactly the point of a publicly published price: a quotation that can be recalculated is a quotation that can be trusted.
Why a standard hall is cheaper: the coverage rule
In the European practice of standard halls a simple rule applies: a structure calculated for a span L and a frame spacing a covers every building of a smaller span and a closer spacing without a new calculation — the German standard structural designs expressly allow it. In practice: the 10×30 type is not one hall but a family of halls— 10×24, 10×18, 9×30… — for which the structural calculation is not done from scratch. The calculation is paid for once, and that is also the reason why a standard structure can have a public price and a “hall to order” cannot.
The limit holds in the other direction too: a wider span or more widely spaced frames = a new calculation. Anyone who offers you “the same hall, only a bit wider” for a span of 12 m without a new structural calculation is offering you a hall without structural analysis.
Two legal facts for this very size
The first: a span of 10 metres sits exactly at the threshold for the checking engineer.A design check is mandatory for spans of “10 m and more” (Ordinance on Design Checking NN 32/14, 72/20, 90/23, Art. 3) — so a 10×30 hall doesgo to a checking engineer, even though it has only 300 m². That is an additional step in the procedure which an honest schedule has to contain, and a dishonest one “forgets”.
The second: as an agricultural building, a 10×30 goes to a conceptual design. With its 300 m² of gross floor area it is well below the limit of 600 m², so the permit is issued on the basis of the conceptual design (ZoG NN 155/25, Art. 62) — we have described the whole easier route step by step. The same building as a commercial warehouse goes the classic way, to a main design (Art. 64).
Standard structure · public calculation
10 × 30 × 5 m — a structure from 22,500 € net, item by item.
The structure of the calculation, with the mass and the starting prices, is published publicly; the final amount is given by a written quotation for your location. A different size? The type is adapted by calculation — not “by eye”.
* The sections and masses apply to the standard structure and to the continental climate zone. The final sizing follows from the structural calculation for the specific location — snow, wind and soil change the figures, and that is the reason why the type has coverage limits.
Frequently asked questions
Modeco's standard hall 10 × 30 × 5 m has 6 portal frames at 6 m centres, that is 12 IPE 330 columns and IPE 240 rafters with a haunch up to 500 mm. Over a length of 30 m that gives 5 bays.
English version of the Croatian original: Hala 10×30: anatomija najtraženije dimenzije — profili, masa, cijena, dozvole.