Repair Systems — 03 — Facade & External Envelope
Grade 316L stainless steel flat bar lintel
Supplier reference for grade 316L stainless steel flat bar lintels for shallow rebate coastal masonry openings on Class 2 strata buildings. Covers Ancon Building Products and state stainless steel fabricators — restricted to spans typically under 2 m where the shallow rebate opening geometry prevents use of a full angle section. Structural engineer deflection verification is mandatory.
What is a grade 316L stainless steel flat bar lintel?
A grade 316L stainless steel flat bar lintel is a rectangular section used to carry masonry load above shallow rebate openings in coastal and marine-influenced Class 2 strata building facades. The flat bar profile has a lower section modulus than an equal angle section — it is restricted to shorter spans (typically under 2 m) and must be verified by a structural engineer for each specific span and loading. It is used where the opening geometry or existing construction prevents the use of a deeper angle section.
Supplier Reference
3 suppliers — grade 316L stainless flat bar lintels — scroll to view all
Ancon 316L Stainless Flat Bar Lintel — shallow rebate coastal
Grade 316L stainless steel flat bar lintel — shallow rebate coastal masonry — AS 4100
System Description
Ancon Building Products supplies grade 316L stainless steel flat bar lintels for shallow rebate coastal masonry openings where a full equal angle section cannot be accommodated within the available structural depth. The flat bar profile allows the lintel to sit within a minimal rebate — particularly applicable in situations where the original construction used a thin flat plate and the opening geometry prevents replacement with a deeper angle section. Ancon flat bar lintels are supplied in grade 316L for coastal and marine applications — the same grade as Ancon's angle lintel range, providing corrosion resistance consistency across the remedial scope. The structural engineer must verify the flat bar section achieves adequate span capacity within the available depth — flat bars have significantly lower section modulus than angle sections of the same height.
Technical Properties
- Minimal profile depth — fits within shallow rebate openings where a full angle section would project below the soffit line
- Grade 316L stainless — full corrosion resistance in coastal and marine environments — maintenance-free service life
- Compatible with Ancon remedial masonry ties and cavity flashing systems — consistent 316L grade across all coastal facade elements
Limitations
- Restricted to spans typically under 2 m — flat bar has significantly lower section modulus than equal-height angle; engineer must confirm span capacity
- Engineer must verify deflection independently — flat bar sections deflect more than angle sections at the same load and span; serviceability must be checked
- Not interchangeable with angle lintel without engineering approval — do not substitute flat bar for angle without explicit engineer sign-off
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Helifix 316L Stainless Flat Bar Lintel — remedial masonry products
Grade 316L stainless steel flat bar lintel — Helifix — coastal / marine — shallow rebate
System Description
Helifix supplies grade 316L stainless flat bar lintel sections for shallow rebate coastal masonry openings as part of its specialist remedial masonry structural product range. The flat bar profile is used specifically where the masonry rebate dimension is too narrow for an angle section. Helifix can supply flat bar to the structural engineer's section specification — sections outside the standard 75×10 mm and 100×10 mm range are available to engineer's specification. Helifix's remedial masonry range includes compatible stainless helical ties, bed joint reinforcement, and fixings — allowing a single supplier system for the full coastal facade remediation scope. Material test certificates confirming grade 316L are available on request. All welded connections must be passivated by the fabricator before delivery.
Technical Properties
- Flat bar sections available to engineer's specification — for shallow rebate openings where angle sections cannot be installed
- Grade 316L — full corrosion resistance in coastal and marine environments — maintenance-free service life
- Compatible with Helifix stainless helical ties and bed joint reinforcement — consistent 316L grade across all remedial masonry products
Limitations
- Engineer must specify the required flat bar section — Helifix supplies to specification; section design is the engineer's responsibility
- Engineer must verify deflection independently — flat bar is significantly more flexible than angle; serviceability must be checked
- Confirm grade 316L on material test certificate — do not substitute grade 304 for coastal applications
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
State Stainless Fabricators — 316L flat bar cut-to-length
Grade 316L stainless flat bar lintel — cut-to-length — engineer's specification — coastal
System Description
State-based stainless steel merchants supply grade 316L flat bar cut to length from standard merchant stock to the structural engineer's specification. This route is used where a purpose-designed flat bar lintel supplier is not available or where the engineer requires a specific custom section outside the standard range. The structural engineer must provide a dimensioned drawing with section width, thickness, length, bearing details, and passivation requirements. Request a material test certificate confirming grade 316L from the merchant before accepting delivery — grade 304 is visually identical to 316L and must not be substituted for coastal applications. Confirm passivation of any welded connections is completed by the fabricator before delivery. State merchants typically carry standard flat bar in 316L grade with short lead times for cut-to-length supply.
Technical Properties
- Full flexibility on section dimensions — any flat bar section from the stainless merchant's standard range can be specified and cut to length
- Grade 316L stainless — full corrosion resistance in coastal and marine environments when MTC confirms correct grade
- Short lead time for cut-to-length standard sections — typically 1–2 weeks from merchant stock
Limitations
- No purpose-designed bearing details or engineering documentation from the merchant — structural engineer must provide complete design drawings
- Material test certificate must be requested explicitly — stainless merchants will not automatically provide MTC without a specific written request
- Passivation of welded joints must be specified and confirmed in writing — do not assume passivation is included in the standard fabrication scope
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Supplier Comparison
Side-by-side comparison of 316L stainless flat bar lintel suppliers. Engineer must verify span capacity and deflection for every application.
| Supplier | Product | Grade | Sections | Life | Distribution | Key feature | Primary use |
|---|---|---|---|---|---|---|---|
| Ancon Building Products | Purpose-designed flat bar lintel | 316L | 75×10, 100×10 mm standard | 50+ yr coastal | National | Purpose-designed, MTC on request | Standard shallow rebate coastal replacement |
| Helifix | Flat bar lintel — remedial range | 316L | Engineer-specified | 50+ yr coastal | National | Full remedial range compatibility | Shallow rebate — non-standard sections |
| State stainless fabricators | Cut-to-length flat bar lintel | 316L (confirm MTC) | Any — from drawings | 50+ yr coastal | State-based | Custom fabrication, full flexibility | Custom fabrication to engineer's spec |
Do not confuse 316L flat bar lintel with:
- 316L angle lintel — deeper equal angle section — higher structural capacity than flat bar — use for all standard openings where rebate depth allows; flat bar is only for shallow rebate openings where angle cannot be accommodated
- Galvanised flat bar lintel — zinc-coated carbon steel flat bar — not suitable for coastal or marine environments; corrodes within 10–15 years in chloride-rich masonry
- Duplex coated flat bar — galvanised plus powder coat — improved corrosion resistance over plain galvanised but not adequate for direct coastal or marine environments
- Back-to-back angle lintel — two 316L angles bolted together — for wide openings requiring higher capacity than single angle; not relevant for shallow rebate openings
Disclaimer
This page provides general technical information only. Grade 316L stainless flat bar lintel design, section size, span capacity, deflection, and bearing details must be specified and certified by a structural engineer for each specific opening per AS 4100 and AS 3700.