Baker Scaffold vs Mason Scaffold: Which Rolling Tower Fits

A Baker scaffold is a narrow rolling scaffold, about 2 1/2 ft wide and 6 ft long, built mainly for indoor work and stackable into a taller tower. A mason scaffold is built from 5 ft wide steel frames joined by 7 ft cross braces, which gives a wider, heavier base for exterior walls. Both become rolling towers on locking casters. The real differences are width, weight and where each one fits.

General information only, not legal or engineering advice. Rules change: check the linked primary sources or ask Cal/OSHA before you rely on them.

What is a Baker scaffold?

A Baker scaffold is a small rolling platform: two ladder-style end frames, side braces, a plywood deck and four casters. You climb the end frames and lock the deck at the height you need. You will also see the name Perry scaffold. MetalTech sells a Perry-style Baker extension, so treat the two names as one family and check the specs of the exact unit.

MetalTech publishes these numbers for its Jobsite Series 6 ft Baker (model I-CISC):

• 74.75 in long, 29.75 in wide and 75 in tall
• 110 lb per unit
• Deck height 27 to 73 in, adjustable in 2 in steps
• 5 in double-locking casters
• Rated for up to 3 units stacked, for a 24 ft reach

The operating manual rates one unit at 1,100 lb of people plus materials. The rating drops to 948 lb at two units high and 851 lb at three, with guardrails. Kireon's 18 ft rolling tower is a MetalTech Baker-style tower of stacked units. The 18 ft tower specs guide covers what that height really reaches.

What is a mason scaffold?

A mason scaffold is frame-and-brace scaffold built from wide steel frames. MetalTech's standard mason frame (model M-MF6060PS) is 60 in by 60 in, so 5 ft wide and 5 ft tall, and its exterior scaffolding catalog calls mason frames ideal for commercial or residential construction. Two frames joined by a pair of 4 ft x 7 ft cross braces make one bay, 5 ft wide and 7 ft long. You stack bays for height and add a platform, guardrails and either casters or leveling jacks.

The weight adds up fast. MetalTech's 5 x 5 x 7 ft frame set with 8 in casters (two frames, two cross braces, four casters) weighs 137.4 lb before any platform goes on. One bay already outweighs a whole 110 lb Baker unit.

Kireon's 15 ft mason-style rolling tower uses heavy-duty steel frames, 5 ft wide by 7 ft long, with adjustable leveling legs and heavy-duty locking casters. Kireon lists it for painting, siding, stucco and construction projects.

Is a rolling tower the same as a Baker or mason scaffold?

"Rolling tower" describes how the scaffold stands, not which frames it uses. A Baker scaffold is always a rolling tower because it comes on casters. Mason frames become a rolling tower once they sit on locking casters. On base plates or screw jacks the same frames make a stationary frame scaffold that runs along a wall in connected bays. The rolling tower vs frame scaffold guide covers that choice.

In California, a scaffold on casters falls under Cal/OSHA Title 8, Section 1646, the rule for tower and rolling scaffolds. Three lines matter most:

• Casters need an effective locking device and stay locked while anyone works on the platform.
• Railings are required once the platform is 7 1/2 ft or more above grade.
• No ladders or other unstable objects on top of the platform to gain height.

This guide is general information, not legal advice.

Baker scaffold vs mason scaffold side by side

The short version: a Baker is narrow and light, a mason tower is wide and heavy. The table puts MetalTech's published numbers next to Kireon's two towers.

Kireon does not publish a load rating for its 15 ft tower, so read the label on the frames before you load the deck.

Why does a mason tower stand taller on its own?

Base width sets how tall a free-standing tower can go. Section 1646 says the minimum base dimension of a free-standing tower or rolling scaffold must be at least 1/3 of its height, unless the tower is guyed or tied. The arithmetic shows the gap:

• Baker base, 29.75 in: 3 x 29.75 in is about 89 in, roughly 7 ft 5 in of height.
• Mason base, 5 ft: 3 x 5 ft is 15 ft of height.

That is why MetalTech calls for outriggers and guardrails once you stack Baker units: 14 in outriggers at two units high and 46 in outriggers at three. Outriggers widen the footprint. A mason tower starts with a 5 ft base, so it has more room under the rule before it needs extra width. Follow the manufacturer's instructions for the tower you rent, because they set the outriggers and bracing for each height.

Which one fits your job?

Pick by where you work, how much room you have and how often you move.

• Interior ceilings, drywall, light fixtures: a Baker tower. It is narrow and light, and MetalTech designed its Baker units to be used and stored indoors.
• Exterior stucco, siding or painting: a mason-style tower. The 5 ft by 7 ft footprint gives you a wider base and a wider deck to work from.
• Outdoors with a Baker: the MetalTech manual says to use it only on a firm, level surface and not in inclement weather or high winds.
• A long wall at one height for days: consider frame scaffold rental instead of a tower.
• A tight side yard or gate: measure first. A Baker unit is 29.75 in wide. A mason bay is 5 ft wide.

Moving the tower has its own rule. The MetalTech manual says never move a scaffold with a worker on it. Section 1646 allows riding a rolling scaffold only under a list of conditions, so take the stricter line from the manual and climb down first. Unlock, roll, re-level, lock the casters, then climb.

Both Kireon towers rent at the same rates, with customer pickup or with round-trip delivery within Sacramento included. The rental terms explain the paperwork: no deposit, a signed rental agreement that states the replacement cost of the equipment. Kireon rents equipment only and does not set up scaffolding, so plan to put the tower together yourself following the manufacturer's instructions.

Not sure which tower fits? Send the job, the height you need to reach and the access in a quote request. Kireon confirms the tower, dates and price in a written quote.

Next step: see rolling tower rental or 18 ft rolling tower rental, then request a quote with your dates and ZIP code.