A column concentrates forces at its base. A suitable pad or other foundation arrangement may be needed to transfer them to the ground or existing supporting structure.
Follow the load below the floor
A base plate spreads forces into the construction directly beneath it, but does not establish that the floor or ground can carry them. The engineer considers the full route from the column through the support and into the foundation system.
Different foundation principles
A pad can transfer loads to assessed ground or form part of a pile-supported arrangement. Existing foundations may offer another route if their suitability is established. The choice depends on loads, ground conditions, existing construction and the project design.
Information before excavation
Provide available foundation drawings and records of previous investigations. If information is missing, the engineer determines what additional investigation is needed. Do not use a schematic section as an excavation or reinforcement instruction.
Coordinate the floor finish
Foundation work can affect floor levels, underfloor heating and the order of repairs. Include these interfaces in the scope and programme. The completed structural support and its connection to the column need agreed checks before they are concealed.
Frequently asked questions
Does every steel column need a new concrete pad?
No. The appropriate support follows from the assessment of loads, existing construction and ground conditions.
Can a base plate replace foundation assessment?
No. The plate and anchorage are only parts of the load path; the structure beneath them must also be assessed.
Continue reading
Editorial team: Draagmuur-Concurrent · Updated .