Small Monitor Above a Heavy Ultrawide: How to Mount It Stably

Quick Answer: Confirm the pole and clamp ratings cover both screens and arms together, then mount the small screen as low above the ultrawide as clearance allows.

• Your pole is tall enough and rated for both: Add the small screen to it. Use Fix A to add an arm to the pole
• The pole is too short or the total is over its rating: Give the small screen its own support. Use Fix B to mount it separately
• Haven't checked the numbers yet: Go to Step 1 to measure and add up the load

• Difficulty: Moderate; you'll work above a heavy screen, and a second person helps.
• Tools: A tape measure, a level, and the hex keys and parts supplied with the arms.

Jump to:

• Step 1 - Check Height, Load, and Fit
• Step 2 - Mount the Small Screen
• Step 3 - Check Both Screens Hold and Clear
• Common Mistakes
• FAQ

What Changes When You Stack a Screen Above an Ultrawide

A second screen on the same pole adds its weight and its arm's weight to everything below: the pole, the clamp, and the desktop. The heavy ultrawide is already using much of that capacity.

Height adds leverage. A screen mounted high on a pole pushes the pole's top further when bumped, and that force reaches the clamp as a larger tipping force than the same screen mounted low.

Viewing height matters too. The ultrawide usually sits near eye level, so anything above it is above your normal sightline. Keeping the small screen as low as possible and tilted down makes it easier to glance at.

Problem state: The small screen is added high on a pole that may be too short or too lightly rated, loading the clamp beyond what the ultrawide alone did.

Corrected state: Both screens fit within the pole's and clamp's ratings, the small screen sits just above the ultrawide with clearance, and nothing collides when either moves.

Critical Safety Warning: Working above a mounted ultrawide risks dropping a tool, a screw, or the small monitor onto it. Overloading the pole or clamp can let the whole assembly tip or the clamp tear out of the desktop.

This happens when the top screen is added without checking ratings, or when it is fitted while the ultrawide sits directly below.

• Lower the ultrawide or swing it aside before working above it, and keep tools off its top edge.
• Have a helper hold the small monitor until its VESA screws are all in.
• Don't mount the top screen if the combined load exceeds any part's rating.

Step 1 - Check Height, Load, and Fit

Measure with the ultrawide at the height you actually use. Take each height straight up from the desk surface.

1. Find the space needed: Add the ultrawide's top edge height, a small clearance gap, and the small monitor's full height. Compare that with the pole's usable height.
2. Add up the load: Add the ultrawide's weight without its stand, the small monitor's weight, any accessories, and the weight of both arms.
3. Compare with every rating: The pole's total limit, the clamp's limit, and each arm's range. The lowest of these decides.
4. Check the small monitor's back: Confirm it has VESA holes and note the pattern, such as 75 x 75 or 100 x 100.

What you found decides the next step:

• The pole is tall enough and the total is within every rating: Go to Fix A.
• The pole is too short, or the total exceeds a rating: Go to Fix B.
• The small monitor has no VESA holes: It needs a different mounting method, such as a holder that grips its edges, rather than a VESA arm.
• You're unsure the desktop can take the load: Check it first with How to Check Maximum Load for Clamped Desk Accessories.

Step 2 - Mount the Small Screen

Both fixes use the assembly guides for your pole mount and any add-on arm. Find the model names on their labels and check which add-on arms or extension poles the maker lists as compatible.

Fix A - Add an Arm to the Existing Pole

Use when: The pole is tall enough and the combined load is within every rating.

Before you start: Lower the ultrawide or swing it out of the way before working above it, so nothing can drop onto its screen. See the overhead-work precaution.

You need: An add-on arm or collar listed for your pole's diameter, with a weight range that includes the small monitor and its VESA pattern.

1. Fit the add-on high enough: Place it so the small screen's bottom edge will clear the ultrawide's top edge at the ultrawide's highest working position.
2. Tighten the collar fully: As its guide directs, with the arm supported.
3. Mount the small monitor: Your helper holds it while you fit all VESA screws.
4. Bring it low and tilt it down: Set it just above the ultrawide and angle it down slightly toward your eyes.
5. Return the ultrawide: Move it back to its working position and route both screens' cables down the pole with slack at each joint.

Check: Both screens sit where you want them without touching. Go to Step 3. If the small screen keeps rising after release, lower its arm's tension; if it still rises at the lowest setting, the monitor is lighter than the arm's minimum load and needs an arm rated for lighter screens.

Fix B - Give the Small Screen Its Own Support

Use when: The pole is too short, or the combined load exceeds the pole's or clamp's rating.

Before you start: A second clamp needs its own sound spot on the desktop, so check the contact surfaces before tightening and keep the ultrawide clear of your work. Review the mounting precautions.

1. Choose a separate tall mount: A single-monitor pole mount tall enough for the small screen, rated for its weight, listing its VESA pattern.
2. Pick its clamp spot: Behind or beside the ultrawide's mount, where the arm can reach over the ultrawide's center.
3. Check the contact surfaces: Flat desktop above and below the pads, no beveled edge, no hollow section, no frame rail or drawer under the lower pad, and a thickness within the clamp's range.
4. Install, then mount: Tighten the clamp as directed, then mount the small screen with a helper.
5. Keep the two mounts apart: Leave enough space that the arms don't touch as they move.

Check: Each mount carries only its own screen and both clamps sit flat. Go to Step 3. If a frame rail blocks the lower pad at the new spot, see Monitor Arm Clamp Hitting the Under-Desk Metal Frame. If the desk has no second sound clamp spot, a pole mount of the right height and rating for both screens is the remaining route.

Step 3 - Check Both Screens Hold and Clear

Move the ultrawide through its full height and tilt range, then move the small screen through its own. Push gently on the pole's top and on each screen, then watch the clamp base.

PASS: The screens never touch through either one's range, both hold their positions, the clamp base doesn't lift or rotate when you push, and the small screen is readable with a short glance up.

FAIL: The screens collide, either one drifts, the clamp base lifts or shifts, or you have to tip your head back to read the small screen.

NEXT ACTION:

• Screens collide: Raise the small screen's collar a little, or limit the ultrawide's tilt.
• Clamp base lifts or shifts: Remove the small screen now and move it to its own support with Fix B.
• The whole desk rocks or a foot lifts when you push the top screen: The combined weight sits too high and too far out for the desk. See How to Balance Desk Center of Gravity with Heavy Equipment.
• The add-on collar creeps down: Support the arm, wipe the pole clean, retighten the collar as its guide directs, and fit a stop collar beneath it if the maker offers one.
• Too high to read comfortably: Lower the small screen and tilt it down more. For viewing geometry, see How Far Should Stacked Dual Monitors Be?

Common Mistakes

Mistake: Checking only the small monitor's weight against the add-on arm.

What happens: The arm is fine, but the pole and clamp now carry both screens and may be over their limit.

Instead: Add up everything on the pole and compare with the lowest rating.

Mistake: Mounting the small screen at the very top of the pole.

What happens: The screen sits well above your sightline and adds the most leverage to the clamp.

Instead: Place it just above the ultrawide's highest working position.

FAQ

What is a small screen above an ultrawide best used for?

Things you glance at rather than read for long, such as chat, system stats, or a calendar. Long reading belongs on the ultrawide.

This guide covers adding a VESA-mounted small monitor above an ultrawide on desk pole mounts. All weight limits come from the pole, clamp, and arm specifications.

Written and edited by Lio Lim

Every guide on The ErgoDesk Lab is reviewed before it goes live so each step leads to a clear next action. Spotted something unclear or wrong? Let us know, or read how these guides are made.