Under-specified hardware causes some of the most common millwork complaints: doors that sag, drawers that will not close under load, locks that do not fit the owner’s key system. Hardware is also a common target for substitution, because product lines look alike on paper. Below: what the standards say, how the main types compare, and what to specify for each use.
Cabinet hardware performance is graded under ANSI/BHMA A156.9, which covers hinges, knobs and pulls, catches, shelf rests and standards, drawer slides, rotating shelves and sliding door track. Most products come in three grades, from Grade 1, the highest, to Grade 3, with each grade defined by the tests the product must pass. Drawer slides add a heavy-duty 1HD grade. Cabinet locks are covered separately, by ANSI/BHMA A156.11.
The Architectural Woodwork Standards, used in Canada through NAAWS, set BHMA Grade 2 as the basic minimum for cabinet hardware and describe Grade 1 as suitable for most institutional applications. Schools, healthcare and other hard-use buildings are where Grade 1 is normally specified.
The number of hinges depends on door height, width and weight; hinge manufacturers publish charts for this, and tall or glass doors usually need more than the minimum. Concealed hinges hold best when fixed with system screws or inserts sized for the panel core. Our article on particleboard, MDF and plywood cores covers screw holding.
The 2nd edition of the woodwork standards describes slide duty by load. For static load: 50 lb for residential and light commercial use, 75 lb for commercial, 100 lb for heavy duty, and more for special conditions. For dynamic (cycle) testing: 30 lb over 35,000 cycles for residential and light commercial, 50 lb over 50,000 cycles for commercial, and 75 lb over 100,000 cycles for heavy duty.
Base the rating on what will go in the drawer. Retail stock drawers, file drawers, tool and parts storage, and cash wrap drawers holding a cash drawer all deserve a heavier slide than a desk drawer of pens.
CSA/ASC B651, the Canadian accessible design standard referenced by the building codes, sets the usual benchmark for operable parts: they should work with one hand in a closed-fist position, or another method that avoids tight grasping, pinching or twisting of the wrist, with no more than 22 N of force. Where millwork has to be accessible, under the building code, accessibility standards or the owner’s own guidelines, such as reception counters, staff work areas and accessible washroom vanities, that rules out small knobs and finger pulls that need a pinch. D-shaped or wire pulls with enough clearance behind them are the usual answer. Mounting height matters as much as the pull itself, so take reach ranges for accessible storage from the architect or code consultant.
Integrated pulls (routed grips, J-channels and edge profiles) give a clean look but should be checked for grip clearance and for how they wear. Pull finish matters too: brushed stainless and satin finishes hide fingerprints and stand up to cleaning products better than polished finishes, which matters in healthcare and food service.
Confirm the keying schedule early and coordinate it with the door hardware supplier or security consultant, so cabinet cylinders and cores match the building system. Locks are often the last hardware decision, and late changes to keying or core type can hold up delivery.
Hardware is often specified as a named product “or approved equal”. To make that work, state the performance as well as the product: BHMA grade, slide load rating and extension, hinge opening angle and soft-close, finish, and lock keying. That gives everyone a fair basis to judge a proposed equal. For large orders or rollouts, a mockup or first article with the real hardware is the cheapest way to confirm feel, alignment and durability before production.
We assemble casework and fixtures in our Vaughan plant, and the shop drawings our drafting team issues for review are the place to confirm hardware for each component before production. If a specified product is hard to source within the schedule, or a lock or slide does not suit the use shown, we raise it at that stage rather than on site. Send us your drawings and hardware schedule and we will flag anything that needs a decision.
The woodwork standards set ANSI/BHMA Grade 2 as the basic minimum for cabinet hardware. Grade 1 is the highest grade and is normally specified for schools, healthcare and other institutional or heavy-use buildings.
The woodwork standards describe 50 lb static load as residential or light commercial, 75 lb as commercial and 100 lb as heavy duty. File drawers and drawers holding stock, tools or cash drawers commonly use 100 to 150 lb full-extension slides. Base the rating on what will be stored.
Yes, for most casework, when the grade and number of hinges suit the door size and weight and the hinges are fixed with screws or inserts made for the panel core. Very heavy, tall or hard-used doors may be better on wraparound, knuckle or continuous hinges.
The usual benchmark is CSA/ASC B651, the Canadian accessible design standard referenced by the building codes: operable parts that work with one hand without tight grasping, pinching or twisting, using no more than 22 N of force. D-shaped or wire pulls with enough hand clearance usually meet this; small knobs and pinch-grip finger pulls do not.
Yes. Interchangeable-core cabinet locks can accept cores from the owner’s keying system. The specification should say which core type is used and whether the owner supplies the cores, so the millwork is prepared correctly.
