Commercial 3x4.5m gazebo - Altegra GRP Super Duty 3x4.5m gazebo

Altegra GRP Super Heavy Duty 3x4.5m gazebo in navy blue - a ground-breaking innovation in the world of gazebos, the dark grey GRP Composite frame is patterned with the fortifying fibre threads, paired with precisely crafted, smooth cast-aluminium joints, delivering the best looking 3x4.5m gazebo frame that's 400% stronger than aluminium and the same weight. Topped by a highly durable canopy that protects with 100% waterproofing and the top UV rating of UVE 99% Most Effective, the Altegra GRP 3x4.5m is the best gazebo available.

Altegra GRP Super Heavy Duty 3x4.5m composite gazebo frame. The NEW, industrial strength GRP composite frame brings a whole new level of dependability to the Australian commercial gazebo and folding marquee market. Add up to 400% strength over leading heavy duty aluminium frames for a marquee that's second to none. Oversized commercial footplates ensure a resilient hold on the ground and robust cast aluminium joints provide steadfast integrity.

Altegra GRP Super Duty composite marquee frame cast aluminium corner joint and ring pull - extreme integrity from uncompromising quality and strength.

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Altegra GRP Super Duty 3×4.5m Gazebo

Price range: $1,599.00 through $1,783.00

The NEW 3x4.5m composite super heavy duty gazebo is 400% stronger than aluminium, redefining commercial 3x4.5m gazebo strength and durability for the toughest conditions.

Frame

GRP Super Duty 3x4.5m

Choose canopy material

330GSM Polyester
520GSM PVC

Choose your colour

Clear

Engineered for Forever – Revolutionary GRP composite frame delivering up to 400% greater strength than aluminium.
50/58mm Hexagonal Frame Profile – A trusted shape, perfected. Built on the proven design of our iconic Heavy Duty frame.
Cast Aluminium Joints – Lasting strength with a smooth, seamless finish.
Peak UV Protection – The highest rating available for portable shelters, UVE 99% blocks 99% of harmful UV rays, comparable to UPF50+ apparel.
100% Waterproof – Ultimate rain defence for reliable shelter, storm after storm.
Lifetime Confidence – Industry-leading Lifetime manufacturer’s warranty for unmatched frame durability and dependability.

Dimensions overview

Width x Length: 3m x 4.5m (2968mm x 4395mm)
Max-height: 310cm – 342cm
Clearance height: 180cm – 210cm
Frame Weight: 37.2kg
Area: 13.5m²
Accommodates: ~15 people standing

More dimensions >

Canopy material options

330GSM Polyester: Heavy duty PVC-lined Polyester material. Highly durable. Ideal for most users. Learn more >
520GSM PVC: The super-duty canopy. Extensive durability. Heavy material. Ideal for longer-term use and extreme weather conditions. Learn more >

Colour selection

Off-the-shelf colours: Locally stocked colours, shipped next day based on availability.
Special order: Made to order colours – a 2x week timeframe to be added to shipping times.
330GSM Polyester – 18 Colours: Select from 18 colours in our 330GSM Polyester canopy. Learn more >
520GSM PVC – 6 Colours: Select from 6 colours in our 520GSM Polyester canopy. Learn more >

Shipping

Free Shipping*: Purchase the 3×4.5m GRP Super Duty gazebo online for free shipping – conditions apply.
Express shipping: Next business-day dispatch and express shipping.

More shipping info >

Commercial 3x4.5m gazebo by Altegra:
Super Duty strength
that lasts a lifetime

Next-generation GRP composite 3x4.5m frame delivers 400% more strength than aluminium - ensuring your events stay secure, professional, and worry-free, year after year.

Product Description

400% stronger than aluminium
Glass Reinforced Polymer (GRP) delivers unmatched tensile and flexural strength, ensuring your marquee stands firm in extreme conditions where aluminium and steel can flex or buckle.
Non-conductive for electrical safety
GRP does not conduct electricity, unlike aluminium or steel frames. This makes it a safer choice when operating near power leads, lighting systems, or live electrical equipment on site.
Corrosion-proof performance
Unlike steel, GRP does not rust, and unlike aluminium, it resists pitting and fatigue from repeated exposure to moisture, salt air, and outdoor environments.
Strength without added weight
Advanced GRP composite design provides super-duty strength with no weight penalty, making setup and transport as easy as lighter aluminium models.
Engineered for longevity
Composite glass fibres and resins are designed to absorb stress over time, extending frame life well beyond traditional aluminium or steel frames.
Cool to the touch
GRP naturally resists heat transfer, so frame components stay comfortable to handle even under direct sun — unlike steel or aluminium, which can become scorching hot.
Reduced maintenance
With no rust, flaking, or paint coatings to wear away, GRP frames require less upkeep than steel or aluminium frames.
Premium appearance
Smooth moulded finishes provide a refined, professional look that resists dents and scratches, keeping your marquee presentation-ready event after event.
High-quality cast aluminium joints
Lasting strength with a smooth, seamless finish — engineered for durability where competitors use cut aluminium with sharp edges.
100% waterproof canopy
Heavy-duty fabric and reinforced seams ensure your event stays dry and protected from sudden downpours.
UVE 99% UV protection
Blocks harmful UV rays more effectively than standard canopies, keeping guests safe and shaded all day long.
Up to 18 stock colours
Choose from a wide colour palette to match your brand or event theme with a canopy that stands out and represents you perfectly.
Upgraded Cordura® nylon big wheel bag
Rugged, oversized wheel bag makes packing and transport easier, protecting your marquee frame from damage while on the move.

Highlights

Altegra GRP Super Heavy Duty 3x3m gazebo frame - the most innovative heavy duty commercial 3x3m gazebo frame in Australia since the hexagonal aluminium frame. The dark, fibre reinforced frame components deliver a considerable upgrade in strength, at 400% greater than aluminium, help keep the gazebo cool, and are non-conductive. Connected with dark cast-aluminium frame connecting joints, the GRP is a work of art and feat of engineering.

Revolutionary GRP Composite Frame - Stronger, safer, cooler

Our new 3x4.5m super-duty folding marquee is powered by breakthrough Glass Reinforced Polymer (GRP) composite technology — delivering up to 400% more strength than aluminium, without added weight. Unlike metal frames, GRP is non-conductive for electrical safety and athermic, so it’s safer when using power sources and helps keep the interior of the marquee cooler on hot days.

Hexagonal Frame 50/58mm - Proven Design, Engineered Performance

Leveraging the proven geometry of our iconic Heavy Duty frame, the 50/58mm hex profile delivers superior strength and stability. Its engineered design resists stress and deformation, ensuring dependable performance. The refined finish reflects both craftsmanship and professional quality.

Premium Gunmetal Cast Aluminium Joints - Strength Meets Precision and style

Precision-cast aluminium frame joints, create a smooth, rounded gunmetal finish that reflects true quality and complement superior strength. Unlike cut and machined aluminium profiles — leaving sharp edges and a rougher feel — our casting process produces components that are stronger, sleeker, and far more refined. The integrated pull-ring adjuster is seamlessly designed for simplicity, ensuring setup ease with a premium look and feel.

Full Specifications

Dimensions

Setup dimensions (W x L): 3m x 4.5m (2968mm x 4395mm)
Sheltered Area: 13.5m²
Accommodates: ~15 people standing
Setup adjustments: 5x heights at 7.5cm increments
Clearance heights: 180cm - 210cm
Max Peak heights: 310cm - 342cm
Folded Dimensions (H x W x D): 160cm x 44cm x 34cm (63" × 17.5" × 13.5")
Frame Weight: 37.2kg - frame only
Gross Weight: 51kg - incl. frame, wheeled bag, guy ropes, pegs & box.
Canopy Weight: 7.7kg (330GSM Polyester), 10.7kg (PVC canopy)

GRP Super Duty frame

Frame material: Innovative GRP composite - Revolutionary GRP composite frame delivering up to 400% greater strength than aluminium.
Frame profile: 50/58mm Hexagonal Frame Profile - A trusted shape, perfected. Built on the proven design of our iconic Heavy Duty frame.
Sidewall thickness: Superior strength 2.5mm sidewall thickness - Rock solid 2.5mm sidewalls deliver unmatched strength and rigidity, without added weight over Heavy Duty aluminium.
Frame connecting joints: Cast Aluminium Joints - Lasting strength with a smooth, seamless finish.
Frame footplates: Oversized 140mm Footplate - Robust commercial footplate for solid gazebo anchoring.
Frame adjusters: Dependable Ringpull Adjustment - Keeping it simple. The infallible ringpull outlasts the rest.
Frame heights: 5x Leg Heights- Extensive, individually height-adjustable legs.
Repairs: 100% Rebuildable - Accidents happen. Protect your investment with spare parts.

330GSM Canopy

Canopy Weight: 7.7kg
Recommended Use: An ideal canopy for most users requiring a durable roof that's foldable, easy to set up, highly protective, and looks great.
Canopy Finish / Aesthetic: The woven fabric delivers a soft, low-sheen matte finish.
330GSM PVC-lined Polyester: Our 330GSM PVC-lined polyester roof is considered a true heavy-duty option, offering superior durability, weather resistance, and user-friendly flexibility compared to lighter alternatives.
UVE 99% Most Effective: Delivering the highest sun protection rating for a shelter from ARPANSA Australian authority.
100% Waterproof: Providing full protection from torrential weather.
Solution-Dyed Fabric: Solution dyed material uses threads that are manufactured in their intended colour to weave a marquee roof with deeper colour that lasts longer.
Fire Retardant: Certified fire-retardant fabric, providing essential safety and peace of mind for public events, workplaces, and compliance with strict regulations.
Internal Seam Binding: Internally rolled seams provide a clean aesthetic while deterring water penetration.
Friction Reinforced: Reinforced for longer life and a stronger hold, all frame-to-material wear points are fortified with additional fabric and are held firmly with Velcro.
360º Walls Attachment: Seal out weather by attaching walls with full-length 50mm internal Velcro connection.
24 Anchor Points: Secured at 24 locations to enhance structural integrity & limit fabric wear.
Customisation: Full sublimation print available.

520GSM PVC Canopy

Canopy Weight: 10.7kg
Recommended Use: For long-term deployments, for industrial tents, humid environments, or when high fire retardancy is needed.
Canopy Finish / Aesthetic: The PVC has a glossy finish that glistens in the sunshine.
520GSM PVC Material: Super heavy duty material for the highest protection and longevity.
UVE 99% Most Effective: Delivering the highest sun protection rating for a shelter from ARPANSA Australian authority.
100% Waterproof: Providing full protection from torrential weather.
360º Walls Attachment: Seal out weather by attaching walls with full-length 50mm internal Velcro connection.
Fire retardant: Certified fire-retardant fabric, providing essential safety and peace of mind for public events, workplaces, and compliance with strict regulations.
Mould Resistant: The durable PVC fabric is mould-resistant, ensuring your marquee stays cleaner, fresher, and longer-lasting even in damp conditions.
Easy To Clean: Hard-wearing material ensures ease of cleaning with a soft brush and mild detergent.
Heat-welded Seams: Delivers a completely waterproof finish with superior strength and longevity over stitched alternatives.
24 Anchor Points: Secured at 24 locations to enhance structural integrity & limit fabric wear.
Friction Reinforced: Reinforced for longer life and a stronger hold, all frame-to-material wear points are fortified with additional fabric and are held firmly with Velcro.
Customisation: Full ink-jet print available.

Warranties

Frame warranty: Lifetime frame warranty.
Canopy warranty: 12-month canopy warranty.

Shipping

Express Shipping: We select the most expedited shipping methods possible.
Next Business Day Dispatch: All in-stock orders ship immediately. We'll be in touch if any delays impede our expedited handling.
Heavy Item $100 fee: Due to freight partners' OH&S, this bulky item is shipped on a skid. A $100 refundable heavy item shipping fee applies.
Refundable fee: We will gladly refund your $100 if you're able to unload with a forklift. View our Heavy item shipping policy in our online shopping terms for more information.
Non-standard destinations: Shipping Australia-wide means there are some areas that are hard to reach, where a third-party provider steps in to help. If your postcode is on our non-standard destinations list, we negotiate a rate with our freight partner and subsidise the rate to meet you in the middle with the best opportunity possible. Complete your purchase online and we'll be in touch to work out the final shipping rate.
: View all shipping terms and conditions >