HVAC Support Systems Solutions
Pre-engineered strut channel framing, rooftop non-penetrating equipment skids, and vibration-isolated pipe & duct supports designed to simplify installation, absorb dynamic loads, and ensure long-term mechanical reliability.
Tensile Strength Available
Fatigue-Tested Reliability
Annual Capacity
Overcoming the Vulnerabilities of Traditional HVAC Framing
HVAC installations demand continuous operation under mechanical vibration, thermal expansion, dynamic wind loads on rooftops, and strict acoustic tolerances. Traditional welded angle iron creates systemic risks that escalate project costs and lead times.
Continuous Mechanical Vibration & Joint Fatigue
Centrifugal chillers, AHUs, and high-velocity ductwork transmit persistent vibration cycles that crack rigid on-site welded joints and loosen friction-based fasteners over time.
3D serrated channel nut locking mechanisms + integrated elastomeric isolators tested for 2,000,000 fatigue cycles without displacement.
Rooftop Membrane Punctures & Thermal Movement
Direct roof anchoring penetrates delicate waterproofing membranes, inviting costly leaks, thermal bridges, and building structure deterioration under heavy seasonal temperature shifts.
Non-penetrating modular rooftop frames equipped with high-density UV-resistant rubber ballast feet that distribute heavy equipment loads safely.
Labor-Heavy Field Welding & Fire Hazards
Traditional hot-work permits, overhead welding, manual rust-proofing touch-ups, and rework in crowded ceiling plenums cause massive installation delays and safety hazards.
100% bolt-together pre-slotted modular channels and standardized fittings reduce on-site labor hours by up to 50% with zero welding required.
Comprehensive HVAC Support Subsystems
Precision-engineered configurations manufactured to fit standard commercial ducts, heavy industrial chilled water risers, and delicate rooftop air handling skids.
Air Duct Support & Trapeze Assemblies
Engineered trapeze hangers for rectangular supply/return ducts, spiral ducts, and smoke extraction systems. Features slotted 41x41mm or 41x21mm strut channels with acoustic dampening pads to suppress airflow transmission noise.
- Accommodates insulated and bare galvanized sheet metal ductwork
- Height-adjustable threaded rod drop connections (M8 to M16)
- Integrated lateral seismic bracing attachment points
Hydronic & Refrigerant Pipe Supports
Heavy-duty multi-pipe racks and cantilever brackets for chilled water (CHW), condenser water (CDW), hot water loops, and VRF refrigerant lines. Fitted with insulated pipe clamps to prevent condensation sweating and thermal energy loss.
- PIR/PUR insulated block clamps with vapor barrier integrity
- Cushion clamps with thermoplastic elastomer inserts for VRV lines
- Sliding guides and fixed anchors for thermal axial movement
Rooftop Plant & Equipment Platforms
Modular support frames for VRF outdoor condensers, rooftop air handling units (AHUs), chillers, and exhaust fans. Freestanding bases equipped with recycled rubber ballast feet preserve roof warranties and distribute loads evenly.
- Engineered wind-load stability with optional ballast weight trays
- HDG Steel or C5-M grade proprietary Aluminum Alloy finishes
- Height-adjustable leg assemblies to counter sloped roofs
Vibration Isolation & Seismic Bracing
Complete dynamic isolation kits including spring hangers, rubber inertia base isolators, and 4-way seismic sway bracing assemblies. Protects MEP infrastructure against earthquake forces and stops structure-borne acoustic hum.
- Compliant with seismic structural framing standards
- High-deflection steel springs with sound-attenuating neoprene cups
- Rigid and cable-type lateral/longitudinal seismic braces
HVAC Support System Selection Matrix
Match your mechanical load profile, environmental conditions, and acoustic isolation criteria to the recommended Lonsonstrut support configuration.
| Application Type | Typical Mechanical Load | Recommended Strut Profile | Material & Finish | Key Isolation Accessories |
|---|---|---|---|---|
| Rectangular Air Ducts | Light to Medium (0.5 – 3.0 kN/m) | 41×21mm or 41×41mm Slotted Channel | Electro-Galvanized / Pre-Galv Q235 | Neoprene Channel Isolator Pads, M10 Rods |
| Heavy Spiral & Smoke Ducts | Medium to Heavy (3.0 – 8.5 kN/m) | 41×41mm or 41×62mm Heavy Duty | Hot-Dip Galvanized / High-Strength Alloy | High-Load Trapeze Clamps, Seismic Bracing |
| Chilled Water (CHW) Risers | Heavy Dynamic (5.0 – 25.0 kN/point) | 41×82mm Back-to-Back Channel | High-Strength Aluminum (728 MPa) / HDG | PIR Cold Insulated Block Clamps + Spring Guides |
| VRV / VRF Refrigerant Lines | Light Vibration (Multi-bundle) | 41×41mm Modular Cantilever | Anodized Aluminum / Pre-Galv | Thermoplastic Elastomer Cushion Clamps |
| Rooftop Chillers & VRF Condensers | Concentrated Static & Wind Loads | Heavy Modular Skid Grid (41×82mm) | HDG Steel (ISO 1461) / Marine Aluminum | Rubber Ballast Footings + Spring Inertia Base |
Why Mechanical Engineers & MEP Contractors Specify Lonsonstrut
Backed by nearly 100 national patents, our proprietary high-strength aluminum alloy and hot-dip galvanized steel systems offer unmatched structural integrity and acoustic control.
High-Strength Lightweight Alloy
Proprietary aluminum alloy matches carbon steel load ratings (up to 728 MPa tensile) at one-third the weight, drastically lowering overhead installation fatigue and structural roof loads.
Anti-Loosening Wedge Design
Precision 3D mechanical interlock design creates self-locking engagement between channel serrations and fittings, preventing slip under motor pulsation and fluid surge.
Extreme Corrosion Resistance
Immune to condensation pooling, cooling tower salt mist, and coastal humidity. Eliminates periodic anti-corrosion repainting and prevents cross-sectional material loss.
Zero Eddy Current Loss
Non-ferromagnetic material eliminates electromagnetic heating and energy losses in shared MEP corridors carrying both high-current cables and HVAC mechanical piping.
Full Batch Traceability & Third-Party Lab Testing
Every production lot is audited for dimensional tolerances (±0.2mm), tensile yield, and galvanization coating thickness.
Engineered for Critical Building & Industrial Applications
From mission-critical data center cooling to sterile hospital ventilation and harsh coastal rooftop installations, our systems provide certified structural support.
Data Center Cooling & CRAH Skids
Supporting overhead chilled water loops, CRAH unit frames, hot/cold aisle containment baffles, and refrigerant headers without generating metallic shavings or zinc whiskers.
Commercial Towers & Malls
Multi-service combined corridors hanging smoke management ducts, chilled water supply, and fan coil units (FCU) within tight ceiling spaces.
Hospitals & Pharmaceutical Cleanrooms
Corrosion-proof aluminum support grids for HEPA filtration housings, positive/negative pressure ductwork, and ultra-quiet laminar flow systems.
Industrial Plants & Factories
Large-bore process cooling water lines, industrial exhaust ducting, and rooftop dust collection ventilation systems subject to continuous mechanical vibration.
Metro Rail & Utility Tunnels
Tunnel ventilation fans and drainage/cooling piping installed on concrete insert channels, delivering high fatigue life under piston-effect pressure waves.
Coastal Rooftop VRF / Chillers
Elevated, aerodynamic framing with ballast feet resisting typhoon-force wind uplifts without piercing the roof membrane or corroding under coastal salt air.
From BIM Clash Detection to Job-Site Kit Packaging
Lonsonstrut provides complete turnkey technical support to EPC contractors, MEP engineering firms, and distributors. We help eliminate field errors before steel arrives on site.
BIM Modeling & Clash Resolution
We provide 3D Revit / AutoCAD family models and participate in MEP corridor coordination to ensure zero interference between ductwork, pipes, and structural beams.
Structural Load & Deflection Calculation
Every submittal package includes comprehensive stress analysis, span-load verification, and seismic brace calculations signed off by structural specialists.
Custom Pre-Cut, Pre-Assembled Kit Delivery
Channels are pre-cut to exact CAD lengths, deburred, labeled, and bundled with matching fasteners by zone/floor, enabling rapid plug-and-play installation on site.
Request HVAC Engineering Submittal
Send us your project drawings, duct/pipe schedules, or load requirements for a detailed layout proposal and quotation.
Frequently Asked Questions
Common engineering questions regarding HVAC modular framing, rooftop ballast support, and material durability.
How does modular framing handle dynamic vibration from HVAC compressors?
Lonsonstrut integrates cold-formed serrated channels with spring-isolated nut fittings and EPDM/elastomeric cushion clamps. The mechanical serration provides 83% greater slip resistance than flat channel nuts, eliminating back-out caused by continuous motor pulsation.
Can rooftop supports withstand extreme wind loads without penetrating the roof?
Yes. Our non-penetrating rooftop skids utilize high-density molded rubber base feet paired with ballast weight trays. Based on project wind-tunnel and site calculations, we specify exact ballast weights to resist overturning and sliding without puncturing the roof membrane.
When should we choose Aluminum Alloy over Hot-Dip Galvanized (HDG) Steel?
Aluminum alloy is recommended when weight reduction is critical (1/3 the weight of steel for easier overhead handling), in highly corrosive coastal/marine environments, in cleanroom applications requiring zero zinc flaking, or where eddy current losses must be eliminated.
How do your insulated pipe clamps prevent thermal bridge condensation?
Our chilled water clamps feature high-density rigid polyurethane (PUR) or polyisocyanurate (PIR) cores with vapor-tight outer outer jackets. This maintains thermal continuity across the support point, preventing surface sweating, condensation drips, and thermal energy loss.
Do you provide custom OEM fabrication for pre-configured HVAC equipment skids?
Yes. With an annual capacity of 100,000 metric tons and in-house tooling, extrusion, stamping, and finishing facilities, Lonsonstrut manufactures customized strut channels, cantilever brackets, and pre-welded/bolted base skids per customer CAD/BIM drawings.
What international testing standards do your HVAC supports comply with?
Our products undergo rigorous testing compliant with ASTM, ISO 1461 (for galvanization), and proprietary dynamic fatigue tests exceeding 2,000,000 load cycles. Full material test certificates (MTC) and quality inspection sheets accompany all export shipments.