Repair Systems — 03 — Facade & External Envelope
Hot-dip galvanised steel channel lintel
Technical product reference for hot-dip galvanised steel PFC channel lintels for masonry facade remediation on Australian Class 2 strata buildings. Covers HDG-only PFC channel lintels for wide inland masonry openings with 15–25 year service life. Structural engineer specification is mandatory for all channel lintel replacements.
What is a hot-dip galvanised steel channel lintel?
A hot-dip galvanised steel channel lintel is a plain HDG parallel flange channel (PFC) section with no paint overcoat, used for wide or heavily loaded masonry openings in inland buildings where angle sections cannot achieve the required span or load capacity. Galvanised-only PFC channel provides 15–25 year inland service life — shorter than a duplex coated channel system (40–50 years). The structural engineer must confirm section, bearing and any back-to-back connection before ordering.
Product Reference
2 supplier systems — hot-dip galvanised PFC channel lintels — scroll to view all
InfraBuild — Hot-dip galvanised PFC channel lintel — wide inland masonry openings
Hot-dip galvanised PFC channel lintel — HDG only — wide openings — inland
System Description
InfraBuild supplies hot-dip galvanised parallel flange channel (PFC) sections for wide or heavily loaded masonry lintel applications in inland buildings. Galvanised-only PFC channel provides the high section modulus required for garage door and wide window openings where angle sections cannot achieve the required span or load capacity — but with a shorter service life (15–25 years inland) than a duplex coated channel (40–50 years). Back-to-back channel configurations require an engineer-designed bolt connection. The structural engineer must design and certify the section, bearing and any back-to-back connection before ordering. Not suitable for coastal or C4/C5 environments — specify stainless steel back-to-back angle or duplex coated channel for those environments.
Technical Properties
- High section modulus — PFC channel significantly outperforms angle sections for wide spans and heavy masonry loads
- AS/NZS 4680 compliant HDG zinc coating — cathodic protection for the channel section in inland C2/C3 environments
- National distribution through InfraBuild steel merchant branches — standard PFC sections widely stocked
Limitations
- Shorter service life than duplex coated systems — HDG only provides 15–25 years inland; specify duplex coated channel for 40–50 year life
- Not suitable for coastal, marine or C4/C5 environments — specify duplex coated or stainless for coastal wide openings
- Structural engineer must design and certify section, bearing and back-to-back connection before ordering
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
State-based masonry lintel fabricators — cut-to-length galvanised PFC channel lintels
Hot-dip galvanised PFC channel lintel — cut to length — local fabrication — engineer's drawings
System Description
State-based masonry lintel fabricators supply cut-to-length hot-dip galvanised PFC channel lintels to the structural engineer's drawings for wide masonry openings in inland buildings. This option is used when the required channel length or configuration is not available as standard stock, or when back-to-back channel pairs are required. The fabricator cuts and hot-dip galvanises the sections per AS/NZS 4680. For back-to-back assemblies, sections are typically pre-assembled and galvanised as a unit. Request a fabrication certificate confirming compliance before accepting delivery. Not suitable for coastal environments.
Technical Properties
- Cut to exact length — consistent bearing length at both ends per the engineer's specification
- Back-to-back assemblies can be pre-fabricated and galvanised as a unit — bolt holes included in HDG bath
- Fabricated to engineer's drawings — section, length and back-to-back bolt connection per the structural design
Limitations
- Shorter service life than duplex coated — HDG only; consider duplex coated for extended life
- Structural engineer's drawings must be provided before ordering — back-to-back bolt connection must be engineer-designed
- Request fabrication certificate confirming AS/NZS 4680 compliance before accepting delivery
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of hot-dip galvanised PFC channel lintel systems. Confirm all selections against the structural engineer's design before ordering.
| Supplier | Product | Coating | Sections | Service life | Distribution | Key feature | Primary use |
|---|---|---|---|---|---|---|---|
| InfraBuild | HDG PFC channel lintel | HDG only — AS/NZS 4680 | Standard PFC range | 15–25 yr inland C2/C3 | National — steel merchant | High section modulus | Wide openings — inland |
| State fabricators | Cut-to-length HDG PFC channel | HDG only — per spec | Engineer-specified | 15–25 yr inland C2/C3 | State-based — local fabrication | Back-to-back pre-assembled | Non-standard wide openings |
Do not confuse galvanised channel lintel with:
- Duplex coated channel lintel — HDG plus paint overcoat; 40–50 year inland service life; the preferred specification for longer service life on wide openings
- Galvanised angle lintel — equal angle has lower section modulus than PFC channel; use angle where the span and load can be achieved with an angle section — reserve channel for wide or heavily loaded openings
- Galvanised flat bar lintel — flat bar has the lowest section modulus; restricted to shallow rebate short spans under 2 m — not a substitute for channel at wide openings
- Stainless steel back-to-back angle or channel lintel — grade 316L stainless for coastal and marine environments; required for wide openings within 1 km of the coast or in C4/C5 zones
Disclaimer
This page provides general technical information only. Hot-dip galvanised channel lintel design, section size, back-to-back connection, bearing length and installation must be specified and certified by a structural engineer per AS 4100 and AS 3700.