Structure Tube
Structure Fittings
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Full technical data and dimensions
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Structure Base
LSBS series, 25 to 50 NB
Cast iron base for the foot of a vertical structure tube — drilled for four foundation bolts and designed to be grouted into a concrete block.
| Product type | Structure base for vertical tubes |
|---|---|
| Material | Cast iron |
| Suits tube size | 25 to 50 NB |
| Fixing | Bolted to foundation and grouted into a concrete block |
| Finish | For use with “B” class galvanised structure tube |
| Catalogue reference | LSBS series |
| Foundation drilling | 4 × 14 mm |
Product overview
What it does, and where it fits.
The base is to be used with vertical tubes. Holes are provided for foundation, so the base can be bolted down and grouted into the floor.
This is the fixed point of the whole structure. The catalogue's grouting instructions are specific: fit the four foundation bolts so the base stands 150 mm clear of the bolt heads, prepare a rough surface for proper bonding, and cast a concrete block roughly 200 × 200 mm up to the underside of the base.
Prepare a separate block for each base rather than one big common block for all bases — separate blocks let each leg settle and move independently instead of transmitting load through a shared slab.
Features
Built into every unit.
- For use with vertical structure tubes
- Holes provided for foundation bolts — 4 × 14 mm on all sizes
- Cast iron construction
- 25 to 50 NB in four catalogue references
- Designed to be grouted into a concrete block
Benefits
Why it earns its place in the line.
- Slidable on the tube and locked with grub screws — position is set on site, not in the shop
- Provides flexibility for future modifications without any hammering or welding
- Cast iron construction, matched to the galvanised tube sizes in the range
- A structure can be extended, raised or re-spanned by moving fittings rather than rebuilding
Applications & industries
Where it is specified.
Typical applications
- Footing a vertical structure tube to the floor
- Establishing the fixed point a glass column is built up from
- Anchoring a tubular structure against lateral movement
Industries served
- Chemical processing
- Pharmaceutical
- Fine chemicals & dyes
- Distillation & solvent recovery
- Water & effluent treatment
- Agrochemicals
- Research & pilot plant
Technical data
Specification for Structure Base.
Figures below are for this product only — every item in the range carries its own dimension table.
| Product type | Structure base for vertical tubes |
|---|---|
| Material | Cast iron |
| Suits tube size | 25 to 50 NB |
| Fixing | Bolted to foundation and grouted into a concrete block |
| Finish | For use with “B” class galvanised structure tube |
| Catalogue reference | LSBS series |
| Foundation drilling | 4 × 14 mm |
| Cat. Ref. | NB | F1F | ID | H | PCD |
|---|---|---|---|---|---|
| LSBS25 | 25 | 150 | 75 | 110 | 4 × 14 |
| LSBS30 | 30 | 150 | 75 | 110 | 4 × 14 |
| LSBS40 | 40 | 150 | 75 | 110 | 4 × 14 |
| LSBS50 | 50 | 175 | 75 | 125 | 4 × 14 |
All dimensions in mm, transcribed exactly from the catalogue page. The PCD column gives the foundation hole pattern as number of holes × hole diameter.
Available on request
- Grouting step 1 — Take one cast iron base and four foundation bolts, each with 2 nuts.
- Grouting step 2 — Fit the bolts in the base so that the base is raised up to 150 mm from the head of the bolts.
- Grouting step 3 — Put this assembly on the floor and prepare a rough surface for proper bonding of grouting.
- Grouting step 4 — Make a concrete block over the bolts of about 200 × 200 mm up to the base of the base, i.e. 150 mm high.
- Grouting step 5 — Prepare a separate block for each base instead of making one big common block for all bases.
FAQ
Questions we are asked about this item.
Fit four foundation bolts with two nuts each so the base sits 150 mm above the bolt heads, stand the assembly on a roughened floor for bonding, then cast a concrete block about 200 × 200 mm up to the underside of the base.
The catalogue says not to. Prepare a separate block for each base instead of one big common block for all bases.
4 × 14 mm on every size in the range, 25 through 50 NB.
Enquiry
Tell us your line size — we'll confirm the spec.
Send the bore, the media, the temperature and pressure, and the flange standard you work to. Drawings and custom sizes welcome.
Not sure which spec fits your process?
Send your requirement — media, temperature, pressure, dimensions — and we'll recommend the right product or fabricate it.
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