Steel fabrication
Fabricated steel structures
Box frames, goalposts, posts and cranked beams, fabricated to your engineer’s design for knock-throughs, rear extensions, loft conversions and new builds across Liverpool and the North West.
Built to your calculations
Every frame is fabricated to your structural engineer’s drawings and calcs.
Ready to bolt together
Delivered with connections, base plates and holes in place for fast installation.
Raw, primed or galvanised
Supplied in the finish your project and building control need.
Structure types
What we build
/ BOX FRAMES
BOX FRAME 1
A ground beam, two columns and a top beam bolted into a rigid frame. Used where walls are removed and no load-bearing wall is left to support the beam.
BOX FRAME 2
A box frame with an added post, where there is no wall to carry the end of the beam.
BOX FRAME 3
Two box frames joined by a cross beam, used when two parallel walls are removed and a perpendicular wall still needs support.
BOX FRAME 4
Box frames with a cross beam, popular when replacing a side wall to open up connected spaces.
BOX FRAME 5
A frame with a bottom beam added to spread heavier loads evenly onto the foundations.
BOX FRAME 6
For when a wall is removed and the new layout doesn’t allow a column against a wall, such as in a corridor.
/ GOALPOSTS
GOALPOST 1
Two columns and a top beam forming a goalpost shape, ideal for wide openings where walls are taken out.
GOALPOST 2
Commonly used for rear extensions, giving a stable, wide opening for bifold or sliding doors.
GOALPOST 3
Supports two perpendicular walls, or floors with large spans that need extra support.
GOALPOST 4
Used when two parallel walls are removed and a perpendicular wall above needs support.
/ POSTS & BEAMS
POST WITH BEAM 1
One end of the beam sits on a load-bearing wall and a steel post props the other end.
POST WITH BEAM 2
A mid-span post for beams that are too long to span unsupported, positioned around your windows and doors.
POST WITH BEAM 3
Corner beams on a post, opening the rear and side walls of an extension for concertina doors.
/ CROSS & CRANKED BEAMS
CROSS BEAM 1
Two beams joined at a right angle to spread loads and support floors or walls above.
CROSS BEAM 2
Parallel beams with a cross member, a strong alternative to gallows brackets for supporting a chimney breast.
CROSS BEAM 3
Cranked beams with cross members, often used in loft conversions and new garages.
DOUBLE CRANKED BEAM
A double-cranked beam on a main beam, used when adding an extra floor or following a roof line.
Project spotlight
Recent projects
Have a similar project? Send us your drawings for a quote.
Steel frames and goalposts in Liverpool and the North West
Whether you are knocking through for an open-plan kitchen, building a rear extension or converting a loft, Alexander Steel fabricates the box frames, goalposts, posts and cranked beams your engineer has specified. Every structure is made in-house alongside our steel connections, saw cutting, drilling and finishing services, then delivered across Merseyside and the North West ready to install. Send us your drawings and our team will come back with a clear quote.