Tower Scaffold
Tower scaffolds are independent structures with prefabricated frames, stairway modules, and outrigger stabilisers that require no building ties. Under BS EN 12811-1, freestanding height is limited to four times the smallest base dimension, or eight times with integral outrigger stabilisers. Ezzogenics' aluminium mobile towers achieve internal heights to 12.0 metres, while steel frame towers reach 20.0 metres with tied configuration.
Last updated: 2026-03-20
Tower scaffolds from Ezzogenics are engineered as independent structures with stairway access, outrigger stabilisation, and load ratings to 3.0 kN/m². Height limits and base-area ratios are calculated per BS EN 12811-1.
Tower Scaffold Configuration and Height Limits
A tower scaffold is an independent structure comprising prefabricated frames, braces, platforms, and stairway modules that provides access without structural ties to the permanent building. Under BS EN 12811-1, tower scaffold height is limited to four times the smallest base dimension when freestanding, or eight times with integral outrigger stabilisers. Ezzogenics' aluminium mobile towers achieve internal heights to 12.0 metres (with outriggers) and external heights to 10.0 metres, while steel frame towers reach 20.0 metres with tied configuration.
The base dimension is the critical stability parameter. A tower with 1.8 m × 1.2 m base may reach 4.8 m freestanding (4 × 1.2 m) or 9.6 m with outriggers (8 × 1.2 m). Outriggers extend the effective base area by cantilevered diagonal braces at 45° from each corner, with adjustable feet on hardstanding. Ezzogenics' design team calculates the exact outrigger configuration for each tower height and load class, providing dimensional drawings and stability-analysis reports.
Stairway Integration and Access Safety
Unlike ladder-only access systems, tower scaffolds from Ezzogenics incorporate integral stairways with 180° intermediate landings, handrail continuity, and non-slip tread surfaces. Stairway inclination is maintained at 1:2 (rise:going) for ergonomic ascent and descent, with 150 mm risers and 300 mm goings. For high-rise towers exceeding 10.0 metres, rest platforms are positioned at 6.0-metre vertical intervals with rescue-access provisions for emergency services.
Platform widths on tower scaffolds range from 0.6 m (single-person inspection) to 2.5 m (multi-trade with material staging). Guardrails at 1.0 m and toe boards at 150 mm are factory-fitted to platform modules — site modification is prohibited. Hatch doors in platform decking provide internal vertical access between stairway landings, eliminating the need to exit the tower at intermediate levels. Ezzogenics' tower scaffolds are supplied with assembly manuals that prohibit on-site welding, cutting, or component substitution.
Mobile Tower Protocols and Braking Systems
Mobile towers incorporate braked castor assemblies at each corner, with 150 mm diameter polyamide wheels and twin-lock brakes (directional and rotational). Castors are rated for 500 kg dynamic load each — four castors providing 2,000 kg aggregate capacity for tower self-weight, platform loads, and personnel. Before movement, Ezzogenics' protocol mandates: platform clearance of all personnel, materials, and tools; brake release in sequence; horizontal force application at base level only; and movement restricted to level, debris-free surfaces with gradient not exceeding 1:100.
Tower movement with personnel aboard is prohibited under WSH (Scaffold) Regulations 2008. Wind-speed limits for mobile tower movement are 8 m/s (Beaufort Force 5) — above this threshold, towers are locked, braked, and, where necessary, tied to adjacent structures. Ezzogenics provides weather-monitoring guidance and emergency tie-down kits for sites with unpredictable wind exposure. Castor brake functionality is inspected at weekly intervals and brake-pad replacement is conducted at 500 km rolling-distance intervals.
Structural Ties and Wind Load Resistance
For towers exceeding outrigger-stabilised height limits, Ezzogenics specifies structural ties to the permanent building at vertical intervals not exceeding 4.0 metres and horizontal intervals not exceeding 6.0 metres. Ties utilise 48.3 mm tube with right-angle couplers at structural nodes — facade anchors are not permitted on unreinforced masonry or curtain-wall transoms without structural-engineer verification. Tie-connection torque is tested to 50 Nm and recorded in the handover-inspection dossier.
Wind loading on tower scaffolds is calculated per SS EN 1991-1-4 (Singapore National Annex) with basic wind velocity of 26 m/s for Singapore's terrain. Ezzogenics' design software models wind pressure on tower facades, applying shape coefficients of 1.3 for rectangular towers and 0.8 for rounded (aluminium) profiles. For towers in open terrain or on building rooftops, velocity-pressure multipliers of 1.5–2.0 are applied, and additional face-bracing is specified to prevent wind-induced racking.
Applications and Procurement from Ezzogenics
Tower scaffolds are specified for atrium maintenance, ceiling-access contracts, void-lighting replacement, and mezzanine construction where ground-level erection is feasible but structural ties are undesirable. Ezzogenics' aluminium tower inventory includes narrow-width (0.75 m) corridor towers, standard (1.2 m) general-access towers, and wide-platform (2.5 m) material-staging towers. Steel towers are configured for formwork support and heavy-duty cladding where load ratings exceed 3.0 kN/m².
Every tower scaffold package from Ezzogenics includes: PE-endorsed design drawings for freestanding or tied configuration, assembly manuals with component inventory, handover inspection with photographic records, weekly inspection service for rental contracts, and dismantling method statement. Contact Ezzogenics with your access-height requirement and platform-load demand for a tower-specific quotation with stability analysis and BCA submission documentation.
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Scaffolding 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.