Base Plate
Base plates are load-distribution components at the foot of every scaffold standard, transferring forces to foundation surfaces through 150 mm × 150 mm bearing areas. Ezzogenics supplies fixed and swivel configurations from S275JR steel, rated for 50 kN axial loads with hot-dip galvanising to BS EN ISO 1461. The 150 mm × 150 mm bearing area provides nominal pressure of 2.22 N/mm² at maximum rated load.
Last updated: 2026-02-10
Base plates from Ezzogenics distribute scaffold point loads to foundation surfaces with 150 mm × 150 mm bearing areas, rated for 50 kN axial load. Swivel and fixed configurations accommodate level and sloped substrates.
Base Plate Types and Material Specification
A base plate is the load-distribution component at the foot of every scaffold standard, transferring vertical and horizontal forces from the scaffold structure to the foundation surface. Ezzogenics supplies two primary base plate configurations: fixed base plates (rigid 90° connection between standard and bearing surface, for level substrates) and swivel base plates (articulated joint permitting up to 15° angular adjustment, for sloped or irregular substrates). Both configurations utilise a 150 mm × 150 mm × 6 mm steel bearing plate with a central spigot socket welded from 6 mm plate, receiving the standard tube with a tight push-fit and optional locking pin.
Material specification is S275JR structural steel with yield strength of 275 MPa, hot-dip galvanised to BS EN ISO 1461 with 55–85 μm zinc coating. The 150 mm × 150 mm bearing area provides a nominal bearing pressure of 2.22 N/mm² at 50 kN axial load — within the 100 kN/m² (0.1 N/mm²) capacity of compacted granular fill, but requiring load-spreading timbers or steel grillage on weaker substrates. Ezzogenics' base plates carry unique serial identifiers, manufacturing-batch codes, and galvanise-thickness verification stamps for full traceability.
Bearing Pressure and Foundation Design
Foundation design for scaffold bases is governed by substrate bearing capacity. Ezzogenics' site assessment measures ground conditions against standard bearing capacities: 150 kN/m² for dense granular soils, 100 kN/m² for medium-dense sands, 75 kN/m² for stiff clays, and 50 kN/m² for loose fills or landscaped areas. Where measured capacity falls below the scaffold's calculated bearing pressure (axial load ÷ bearing area), Ezzogenics specifies load-spreading measures: timber sole boards (225 mm × 225 mm × 38 mm hardwood, distributing load over 0.05 m²), steel grillage beams (150 mm × 75 mm channel sections spanning across weak zones), or concrete blinding slabs (100 mm thick, C20/25 grade, for long-term installations).
For suspended slabs or post-tensioned decks, point loads from scaffold standards (typically 5–8 kN per base) must be verified against slab capacity. Ezzogenics engages the building's structural engineer to review slab drawings, identify tendon locations (avoiding anchor zones), and specify load-spreading dimensions. Where slab capacity is marginal, steel distribution plates (300 mm × 300 mm × 10 mm) or timber spreader beams (450 mm × 225 mm × 50 mm) are mandated, with structural-engineer endorsement and BCA notification. This foundation-design discipline eliminates the primary cause of scaffold-base failures: unverified point loading on undersized substrates.
Base Jack Integration and Vertical Adjustment
Base plates are typically integrated with adjustable base jacks for verticality compensation on uneven ground. Ezzogenics' base jacks comprise a 150 mm × 150 mm base plate, a 38 mm diameter threaded stem with 600 mm adjustment range, and a cast-iron or steel nut welded to the standard foot. The jack provides ±150 mm vertical adjustment, enabling scaffold levelling on substrates with gradient up to 1:20 without packing materials. For gradients exceeding 1:20, Ezzogenics specifies stepped base configurations with individual standards at each level, connected by ledger continuity, or ground-grading to level before scaffold placement.
Thread engagement is the critical safety parameter: minimum 150 mm thread engagement (5× pitch) is required to prevent stripping under axial load. Ezzogenics' handover inspection verifies thread engagement at every base jack, photographs engagement length, and records measurements on the Scaffold Handover Certificate. Post-handover, base-jack settlement is monitored weekly: settlement exceeding 10 mm triggers re-levelling, and settlement exceeding 25 mm triggers structural-engineer review of substrate integrity. This proactive monitoring prevents the progressive settlement that leads to scaffold racking and structural instability.
Inspection, Maintenance, and Replacement Criteria
Base plates and base jacks are inspected at every scaffold handover, weekly during service, and after any event affecting stability. Ezzogenics' inspection protocol includes: bearing-surface inspection for deformation, cracking, or zinc-loss exceeding 20%; spigot-socket inspection for ovality or weld cracking; thread inspection for galling, deformation, or debris accumulation; and settlement measurement with calibrated depth gauge. Base plates exhibiting deformation exceeding 3 mm over the 150 mm bearing surface, or jack stems bent beyond 5 mm over 600 mm length, are removed from service and returned for refurbishment or retirement.
Replacement base plates and jacks are supplied from Ezzogenics' certified stock with full traceability documentation. Rental contracts include provision for component replacement during the contract term, ensuring that no degraded base component remains in service beyond its safe lifecycle. For long-term installations exceeding 12 months, Ezzogenics recommends mid-contract base-component rotation to equalise wear patterns and maintain fleet uniformity. Contact Ezzogenics for base-plate specification, foundation-design review, and substrate-bearing assessment for your scaffold installation.
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Get a Free QuoteScaffolding FAQ
The optimal scaffold system depends on height, load demand, geometry, and duration. Our engineering team evaluates these parameters and recommends frame, tubular, suspended, tower, or mobile configurations with PE-endorsed design drawings.
Every scaffold exceeding 4 metres requires PE design approval, MOM-certified erectors, and handover inspection. We manage all regulatory requirements including BCA submission and weekly competent-person inspections.
MOM mandates weekly inspections by a competent person. Re-inspection is required after weather events, structural alterations, or impacts. We provide weekly inspection services with photographic documentation.
Yes. All non-standard scaffolds, systems exceeding 30 metres, and cantilevered configurations receive PE-endorsed structural calculations, load-path verification, and BCA submission documentation.
Steel offers higher load capacity (up to 6.0 kN/m²) for heavy-duty construction. Aluminium provides 50–60% weight reduction for faster assembly and manual handling, ideal for interior fit-out and maintenance.
Submit project details through our contact form, email david@ezzogenics.com, or call +65 9632 0750. We issue quotations within 24 hours for standard systems and 48 hours for complex designs.