Multi-shift desks
Desks worked across two or three shifts need a chair rated for continuous, around-the-clock occupancy — not an 8-hour task chair.
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Shop · Heavy-Duty & 24/7 Chairs
Ontario supplier since 1964The best heavy-duty & 24/7 office chairs for Canadian workplaces.
Big-and-tall, bariatric, and multi-shift seating rated to 400 and 500 lb — specified, delivered, and installed across Ontario by Brant Business Interiors since 1964.
The short answer
The best heavy-duty office chair is the one rated for the weight and the hours it will actually carry.
What "heavy-duty" actually means
A heavy-duty office chair is built and weight-rated for bigger bodies and longer hours than a standard task chair — typically a 400 or 500 lb capacity, a reinforced mechanism and base, and, for control rooms and dispatch desks, a 24/7 occupancy rating. For most Canadian workplaces the right pick comes down to three numbers: the heaviest user it must support, whether it runs one shift or around the clock, and whether it is for a desk, a waiting room, or a clinical space.
Why buy through Brant Business Interiors
We carry contract-grade heavy-duty seating from Global Furniture Group and Offices to Go, match the model to who is sitting and for how long, and deliver and install it with our own Ontario crew. One contact for the quote, the delivery, and any warranty service after — not a carton you assemble and register yourself.
Best for
Built for the desks a standard chair cannot carry.
Call centres, dispatch & control rooms
24/7-rated mechanisms and bases hold up where a seat is never empty — emergency dispatch, security desks, and monitoring rooms.
Big-and-tall staff
A 400 or 500 lb capacity, wider seat, and reinforced base support bigger users comfortably and safely all day.
Bariatric & clinical seating
Waiting rooms, exam rooms, and patient areas need bariatric-rated guest and stacking chairs with entry-and-exit assist.
Compared · chairs we carry
Three heavy-duty chairs, side by side.
Every figure below is pulled from the manufacturer specification for the exact model — the same spec sheet we quote from.
Raven high back heavy duty synchro-tilter chair — OTG10703B
A mesh-back synchro-tilter rated for round-the-clock use — the pick for dispatch desks, control rooms, and any seat that is never empty.
Weight Capacity400 lbs (heavy-duty, 24/7 use)
Dimensions29"W x 27"D x 43.5"H
Certifications
- GREENGUARD
- GREENGUARD Gold
MaterialsBlack mesh back, black woven textile seat, black powder coated heavy duty metal base
WarrantyLimited Lifetime Warranty
Made In Canada
Robust high back multi-tilter chair 500lb weight capacity — GLB74475
A 500 lb multi-tilter built for bigger users and full-day desks, with width-adjustable arms and a six-prong steel base for stability.
Weight Capacity500 lbs
Dimensions29"W x 27.5"D x 50.5"H overall; seat width 25", seat depth 20", seat height 16.5"–20.5"; back height 30" from seat; base diameter 32"
Certifications
- BIFMA X5.11
MaterialsUltracell high-density high-resilient foam seat and back; abrasion-resistant polyester back fabric; two-tone upholstery (outer border/trim always in Silhouette fabric SL20 Asphalt black); solid steel vinyl-dipped loop-style arms; 6-prong oval tubular steel base (black); 3" dual-wheel black/grey casters rated 225 lbs each
WarrantyLimited Lifetime Warranty — lifetime of product for individual end-user; 25 years for corporate end-user (some time limits apply to specific parts/components)
Made In Canada — Toronto, ON
GC Comet™ Bariatric Stacking Armchair (GC2180)
A 500 lb bariatric stacking armchair for waiting rooms, exam rooms, and guest seating, with flat armrests that assist entry and exit.
Weight Capacity500 lbs (active weight, bariatric)
Dimensions31.5"W x 27"D x 38"H
Certifications
- Exceeds ANSI/BIFMA
MaterialsRound tubular steel frame with wall-saver legs, Ultracell foam seat, injection-moulded polypropylene fully-extended armrests
WarrantyComprehensive Limited Lifetime Warranty
Made In Canada (Global)
What to look for
How to choose a heavy-duty chair that lasts.
Match the capacity to the heaviest user
Weight rating is the first number that matters. A 400 lb chair covers most big-and-tall staff; 500 lb covers bariatric and the widest range of users. Buy for the heaviest person who will sit in it, not the average.
Check the occupancy rating, not just the hours
An 8-hour task chair is not a 24/7 chair. Seats worked across shifts — dispatch, security, monitoring — need a mechanism and base rated for continuous, around-the-clock occupancy, or they wear out early.
Look at the base and mechanism, not the fabric
Heavy-duty durability lives in the steel base, the gas lift, and the tilt mechanism. A six-prong steel base, a rated gas cylinder, and contract-grade casters are what carry the load — fabric is the last decision, not the first.
Browse & compare
Keep exploring heavy-duty seating.
OECM Supplier Partner
Brant Business Interiors is registered under our parent legal entity, Brant Basics, as an authorized OECM Supplier Partner. Eligible Ontario broader-public-sector buyers — school boards, hospitals, and municipalities — can purchase heavy-duty and 24/7 office chairs from us without an open tender. Family-owned and supplying Ontario workplaces since 1964, from 296 George St N, Peterborough, ON K9J 3H2.
Common questions
Heavy-duty office chairs — common buyer questions.
It depends on the heaviest user and the hours the seat is worked. For around-the-clock desks we point buyers to the Offices to Go Raven 400, a synchro-tilter rated for 24/7 use; for big-and-tall staff the Global Robust multi-tilter at 500 lb capacity; and for clinical waiting and exam rooms the Global Care GC Comet bariatric stacking armchair at 500 lb. Brant Business Interiors carries all three and will match the right one to your people.
Buy for the heaviest person who will use the chair, not the average. A 400 lb capacity covers most big-and-tall staff; a 500 lb capacity covers bariatric users and gives the widest margin. The Raven 400 is rated to 400 lb, while the Robust multi-tilter and the GC Comet are rated to 500 lb. Tell us who is sitting and we will confirm the right rating.
A 24/7 chair has its mechanism, gas lift, and base rated for continuous occupancy rather than a single 8-hour shift — so it holds up where a seat is never empty, like emergency dispatch, security desks, and control rooms. The Offices to Go Raven 400 we carry is rated for 24/7 use. A standard task chair used around the clock wears out far sooner.
Yes. The Global Care GC Comet is a 500 lb bariatric stacking armchair designed for patient, exam, and waiting-room use, with a compact footprint, wall-saver legs, and flat polypropylene armrests that assist entry and exit. It stacks two-high for storage. For clinical fit-outs see our healthcare page, and tell us the room and we will spec the seating.
The lines we carry are built to recognised contract standards — the Global Robust is tested to exceed the BIFMA X5.11 large-occupant standard, the GC Comet exceeds ANSI/BIFMA, and the Raven 400 carries GREENGUARD Gold low-emission certification. All three are made in Canada by Global Furniture Group and its Offices to Go division. Ask us to confirm the certifications on any model you are quoting.
Eligible Ontario broader-public-sector buyers — school boards, hospitals, and municipalities — can purchase from us without an open tender under our OECM Supplier Partner agreement, held by our parent legal entity, Brant Basics. Call us and we will confirm your eligibility and quote with delivery and installation across Ontario.
Request a quote
Spec your heavy-duty chairs with a real person.
Tell us the heaviest user, the shift pattern, and the headcount. We will quote the right heavy-duty or 24/7 chairs for your people — delivered and installed across Ontario.
Request a Quote
Call 1-800-835-9565
Brant Business Interiors · 296 George St N, Peterborough, ON K9J 3H2 · 1-800-835-9565 · supplying Ontario since 1964.