Shademaker Astral 16.5' Square Centerpost Umbrella

Shademaker SKU: AST-50S-SS/40433
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&
Shademaker Astral 16.5&

Shademaker Astral 16.5' Square Centerpost Umbrella

Shademaker SKU: AST-50S-SS/40433
Canopy Fabric Color
Frame Finish Color
Regular price $5,009.00
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  • Free Standard Shipping (Contiguous U.S.)
  • Inside Delivery / Assembly Available (Upgrade at Checkout)
  • Protective Cover Included
  • Authorized Shademaker Dealer
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Shademaker Astral: Premium Outdoor Centerpost Umbrella

Designed with superior durability and performance in mind, the Shademaker Astral 16.5' Square Centerpost Umbrella offers expansive shade to any outdoor living space. This telescoping umbrella opens and closes easily over tables and chairs with only a few simple rotations of the removable crank. Plus, it's built from commercial-grade fasteners, aluminum hubs and fittings, and a galvanized steel stem so that you can enjoy a durable, stylish, and weatherproof umbrella for years to come. 

Available in a variety of contemporary colors and neutral tones, Astral is made from 100% solution-dyed acrylic and polyester fabric, woven by two of the most popular names in outdoor fabrics: Sunbrella® and O'Bravia®. These premium materials offer superior resistance to corrosion, mildew, fading, wear, and tear, making this umbrella perfect for any commercial, market, or residential space. 

Also available in 13' Square and 16.5' Octagon models.

Why Choose the Astral 16.5' Square Centerpost Umbrella

1. Telescoping Mast

Designed with a telescoping center mast so that you can close the canopy smoothly over tables or seating areas without needing to move any furniture. Ideal for restaurants, lounges, and commercial patios where fixed layouts are common.

2. Quick & Effortless Crank Lift System

Integrated with a user-friendly crank lift system so that opening and closing the umbrella takes just a few easy turns, offering smooth operation and reliable performance with minimal effort.

3. Premium-Grade Aluminium Hub & Fittings

Constructed with precision-machined aluminium hubs and fittings so that you get solid structural support that resists rust and wear, even in busy or exposed outdoor spaces.

4. Commercial-Grade Canopy Fasteners

Fitted with reinforced canopy fasteners so that your canopy stays securely attached during strong winds or heavy use, while also contributing to a clean, tailored look.

5. Removable Crank Handle

Equipped with a removable crank handle so that you can protect the mechanism from unnecessary wear or tampering, especially in shared or public areas. It also makes for a more streamlined appearance when not in use.

6. Galvanized Internal Mast Stem

Features a galvanized steel inner mast so that you gain extra strength and corrosion resistance, making it ideal for long-term installations—even in coastal or humid environments.

7. Includes Aluminium Mast Stem Cover

Comes with a custom-fit aluminium cover so that the mast is protected from sun, rain & debris, while maintaining a modern, professional finish that complements any setting.

8. Includes High-Performance Protective Cover

Supplied with a weather-resistant cover so that your umbrella stays clean and protected when not in use—helping to extend its life and reduce maintenance over time.

NOTE: Images displayed above may feature both square and octagon canopy options to demonstrate lifestyle settings and mounting/base options. Additional color options are available upon request. Check them HERE or CONTACT US for details.

What's Included

  • Astral 16.5 ft. Square Centerpost Umbrella
  • Protective Cover
  • Mounting Kit Options
    • Concrete Mount Kit 
    • In-Ground Mount Kit 
  • Base Weight Options
    • 715 lbs Infinity Steel Base 
    •  Titan Steel Base 
    • Z-Plate with or without Wheels (Sold Separately)

Mounting Kits and Base Weights Explained

Choose the right support system to keep your Patio Umbrella stable and secure in any setting. Opt for a permanent mount kit for a secure, fixed installation or a freestanding base for flexibility and easy repositioning.

Check the Base Weight Matrix for the recommended base weight and alternative options. 

Concrete Mounting Kit 

Plate Dia. - 8.46" | Thickness - .63" | Weight - 7.76 lbs

Includes: Adapter plate and expansion bolts.

In-Ground Mounting Kit

Plate Dia. - 8.46" | Thickness - .63" | Weight - 6.62 lbs

Includes: In-ground fitting

Infinity Base


Item No: BXI715 | Weight: 715 lbs.

Size: 44.5” x 44.5" x 1.8"

Finish: Shadow Graphite, Architectural Bronze, and Arctic White

Galvanized Steel Frame + Aluminum Lid, Galvanized Steel Plates

Check Product Page HERE


Titan Base


Item No: BGT850 | Finishes: Shadow Graphite, Architectural Bronze, and Arctic White

Weight: 118.1 lbs. | Size: 40.5" x 40.5" x 6.4"   

Galvanized Steel Frame + Aluminum Lid

Accommodates (32) 12″x12″x1.5″ pavers (Not Included).

Check Product Page HERE


Z-Plate

Z-Plate with Wheels


Sold Separately

Note: You need a set of (1x) ZB115 and (3x) ZB225 Z-Plates for Astral 16.5' Square. 

Check Product Pages HERE: ZB115 and ZB225

Total Weight: 790 lbs

Finishes:  Shadow Graphite, Architectural Bronze, Arctic White, and Sand

--

Can be purchased with Wheels (ZBWH-LG)

Weight: 6.61 lbs. | Diameter: 4"

Product Specification

Below are the key dimensions of the Astral 16.5' Square Centerpost Umbrella.

Key Description AST-50S

Canopy Shape
Square
Coverage 266 sq ft
Ribs 8
Size 16.5 ft | 5.0 m
A
Lower Hub Height (Open)
7’ 4” ft | 2.2 m
B
Rib End Height (Open)  
7’ 7” ft | 2.3 m
C
Canopy Length (Diagonal)   
23’ 2” ft | 7.0 m
D
Canopy Width
16’ 4” ft | 5.0 m
E
Overall Height (Open)
9’ 1” ft | 2.8 m
F
Overall Height (Closed)
13’ 9” ft | 4.2 m
G Rib End Height(Closed) 2’ ft | 0.6 m
H Height to Crank Handle 2’ 7" ft | 0.8 m

Min. Base Weight 700 lbs.

Product Resources

For more information on specifications, manuals, warranty, technical sheets, and maintenance, refer to the following resources:

Shipping & Returns

We ship across the contiguous United States. Shipping to Alaska and Hawaii may be available on request.

Estimated delivery timing is shown above for each product.

Smaller items ship via parcel carriers. Larger items are delivered curbside or via scheduled freight.

Optional services such as inside delivery & package removal, and assembly may be available at checkout.

Returns are accepted within 30 days of delivery for eligible items.

Please note:

  • Umbrellas and related accessories are non-returnable unless faulty or damaged
  • Select large furniture items are not eligible for return once shipped unless faulty or damaged
  • Large items may incur return shipping and handling costs

For full details, please see our Shipping and Returns & Refunds policies.

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