An exterior terracotta louver length can be selected only within a precisely identified profile, orientation, support arrangement, exposure and engineered load path. The “1500 mm maximum” wording in this page title is a 2013 archive label—not a current production limit, allowable span or safety conclusion.
Replace the archive maximum with a length schedule
Start with a current profile code and drawing defining cavities, internal webs, visible faces, surface, color, tolerances and interface features. Confirm whether LTY5X12 remains current. Then schedule required lengths and facade locations rather than carrying one maximum into every zone.
Separate manufactured piece length from engineered support condition. A long element may have several possible interface concepts, but the responsible design and current evidence determine the approved configuration. Do not infer span or capacity from the historical 1500 mm wording.
Identify regular fields, edge zones, corners, openings and special terminations in the schedule. This makes product feasibility, structural review, packaging and facade sequencing traceable and prevents an archive length from becoming an uncontrolled procurement default.
Coordinate profile, orientation and end support
Profile
Match the exact section, cavity layout, internal webs, tolerances and permitted support interfaces.
Orientation
Show vertical, horizontal or other placement because it changes loading, drainage, ends and appearance.
End condition
Resolve visible faces, caps where proposed, cavities, clearances and material contacts in current details.
Support identity
Name the exact pins, clips, rails, frames, fasteners and adjacent components by revision.
Use coordinated sections at typical fields and difficult boundaries. If the end or interface cannot be achieved within the approved configuration, return the issue to design and manufacturer review rather than introducing site drilling, packing or sealing.
Trace the exterior wind-load path
The responsible designers should establish applicable project actions and trace them from the louver through each support, rail or frame, bracket, fastener, anchor and substrate. Evidence must identify the exact profile, length, orientation, components, boundary conditions and limitations it covers.
The legacy technical table names a 300 × 600 × 18 mm panel, not the LTY5X12 louver. Its numerical values cannot qualify the linear assembly. Evidence from another profile, length or support arrangement requires a documented applicability review.
Account for manufacturing and assembly tolerances
Coordinate product, support, frame, survey and substrate tolerances across the complete array. Current drawings should define acceptance and inspection methods for relevant geometry such as length, straightness, twist, end condition and interface fit without assuming archive values apply.
Review tolerance accumulation across repeated units and facade zones. A small individual departure can become a visible alignment issue or reduce interface fit when repeated. Track measurement results by batch and location, and route deviations through responsible approval.
Use production-intent samples for fit-up and record the component and drawing revisions. A successful nominal assembly does not by itself cover tolerance extremes or establish structural capacity; it supports only the scope defined by the project team.
Review exposure, water and material contacts
Map project exposure by elevation and zone. Coordinate wetting, drying, freeze or heat conditions identified by the team with the selected terracotta, supports, fasteners, caps or seals, membranes and neighboring metals. Generic exterior use is not a durability conclusion.
Resolve cavities, ends, horizontal surfaces, flashings and drainage through the complete facade design. Request current handling, cleaning and maintenance information for the exact surface. Avoid unverified environmental or waterproofing claims based on the old material label.
Approve a representative exterior assembly
Build a project-defined mock-up using production-intent louvers and supports, including an important boundary where appropriate. Review profile direction, color range, alignment, ends, background, joint rhythm, support visibility, access and water-related details against predetermined criteria.
Use the assembly to identify buildability and inspection issues, not as an automatic performance certificate. Record findings in drawings, evidence and quality documents. Reassess the mock-up scope if length, profile, orientation, support or substrate changes.
Release current evidence and traceable handover
Issue profile and length schedules, finishes, supports, fasteners, anchors, substrate, calculations or tests, certifications, inspections and change control as one package. Recheck every old CE, ISO, natural-clay, green-material or performance entry for exact current scope.
Retain as-built zones, product and support lots, evidence, inspections, deviations, maintenance and replacement information. Review current terracotta louver options and project references only as context before exact verification.
Match packaging and delivery identification to the approved profile and length schedule. Quarantine damaged, substituted or unidentified pieces. Traceability should continue through distribution and installation so the site team can verify that each facade zone received the reviewed configuration.