Metal Building Erection — Steel Erection Sequence, Technical Requirements & Field Coordination

KAFA provides erection drawings, component documentation, bolt specifications, and remote technical support as standard. On-site technical presence from KAFA is not included by default and should be requested during the project scoping stage. Availability depends on project location and schedule, and the scope of on-site support should be confirmed in the project agreement before fabrication begins.

Duration depends on building footprint, number of frames and bays, crew size, crane configuration, and site access conditions. For a standard single-span industrial building of 1,000–3,000 m² with a four-person crew and one crane, two to four weeks for primary and secondary framing is a common planning range. Cladding and enclosure adds further time that depends on panel type, trim complexity, and weather conditions. These ranges should be confirmed during pre-erection planning based on KAFA’s drawing package and the appointed contractor’s crew capacity.

Local contractors with general steel experience can erect a KAFA building if they receive KAFA’s erection drawings in advance and are briefed on PEMB-specific requirements before mobilisation: braced bay start sequence, temporary bracing protocol, purlin lap direction, flange brace placement, and bolt torquing procedure. General steel construction experience does not substitute for familiarity with pre-engineered building conventions. We recommend a pre-erection drawing review session with the installation supervisor before any crew mobilises.

Out-of-tolerance anchor bolts must not be compensated by modifying the base plate, adding shims beyond the engineered specification, or forcing the column into position. The deviation magnitude and direction should be documented and shared with KAFA’s engineering team. Options — which may include revised base plate connection details or localised foundation remediation — must be assessed by the engineering team before erection proceeds. The extent of remediation required depends on the specific deviation and its location within the bolt pattern.

Erection can continue during rainfall provided foundation concrete has reached full design strength, crane outrigger ground conditions are confirmed before each lift, and the installation sequence follows KAFA’s drawings. Roof sheeting should not be installed during active rainfall. Setting-out and foundation-level work should not proceed when standing water is present in the building footprint. Wind speed must be monitored continuously, with erection on unsupported frame sections suspended when site wind exceeds 25 mph (40 km/h).

All bolts are first set to snug-tight — fully engaged with contact faces in bearing. After each frame is plumbed in both principal axes and temporary bracing is in place, bolts for that frame are taken to final torque values per KAFA’s torque table for the applicable bolt grade and connection type. Final torquing proceeds frame by frame as erection advances. Torquing all connections as a single pass after the complete primary structure is standing is a sequencing error that compromises the ability to achieve accurate final plumbing.