APG ORIGINAL SPECIFICATION CLAUSE — STEEL-BALCONY-SPEC-R2 — 25 October 2026
Steel flatbar balcony guarding development candidate: steel-balcony-1500 / S1
System classification: Ss_25_60_05_05 Balustrade and guarding systems (July 2026).

CHECKED DRAFT FOR TECHNICAL REVIEW. NOT FOR CONSTRUCTION OR PROCUREMENT.
This clause is bound to this exact width; do not transfer it to another application.
Resolve the companion gap register before project issue. This is APG-authored text,
not an NBS proprietary clause, approval, certification or Source listing.

Product: APG continuous welded flatbar balcony kit, 1500 mm overall including
12 mm endplates; nominal rail span 1476 mm. Guard top 1100 mm above proposed
finished floor. Confirm legal manufacturer, technical contact and project use.
Candidate material: S275JR hot-rolled steel flatbar; obtain exact mill certificate
and accepted welding/material specification. Rail 60x10, uprights 40x8, two lower
strips 80x8 mm. Do not substitute material/form or geometry without reassessment.
Construction: retain continuous lower strips, broad faces vertical and face-welded
across every upright; no midrun splices. Retain flush end interfaces and structural
wall ties at handrail height at BOTH ends. The model weld envelopes do not specify
qualified throat, effective length, WPS or resistance. Obtain approved weld detail.
Interfaces: nominal lower fixing rows z=-140/-320 mm. Refer to exact CAD/BOM for
actual station coordinates; holes and tool envelopes are proxies. Survey actual
slab, floor buildup and wall/substrate geometry. Obtain site-specific anchor design,
embedment, edge/spacing limits, installation tolerances, torque and inspection plan.
Performance: project engineer to adopt jurisdiction, occupancy/actions/combinations,
infill/point/wind/vertical actions, deflection limits and durability requirements.
Existing studies are preliminary gross-elastic sensitivities, not tested capacity.
Require competent independent verification and applicable representative assembly,
connection/substrate testing evidence before technical release.
Finish: insert accepted corrosion/coating system, exposure, preparation, thickness,
colour/gloss, repair method and compatibility. No current coating claim supplied.
Execution: use accepted fabrication and inspection drawings, qualified welding and
distortion controls. Install only to reviewed method, lifting/access arrangement,
temporary protection and accepted substrates; inspect before removing protection.
Handover: provide as-built IDs/revisions, anchor/weld/finish records, approved
maintenance/cleaning instructions and confirmed warranty. Supply product-specific
environmental evidence only where verified. No native BIM object is delivered here.
Reference documents: PRODUCT-DATA.json/CSV, GAP-REGISTER.json/CSV, SOURCE-TRACE.json,
INSTALLATION-MAINTENANCE-DRAFT.txt and evidence/APG-S1-face-welded-slim.step.