Understanding monitor arm and mount capacity
Weight and depth matter most
We therefore publish maximum screen sizes for guidance - but for monitor arm and mount selection certainty, the specific monitor or display weight and depth must be validated. Atdec is available to assist - contact us.

Popular monitor sizes and styles
Monitor and display 'screen size'
Screen size is the diagonal measurement of the monitor or display. It is typically measured in inches, even in countries that use the metric system.
Atdec's suggested maximum screen size refers to the largest screen size that is likely to be mounted on the monitor arm or mount in question.
The space around the screen is called a 'bezel;' it is the plastic (usually) enclosure of the device. Bezel size varies, which impacts the cockpit geometry achieved with multi monitor setups like AWMS-2-D40 dual monitor arm.
Display or monitor depth and weight also vary between devices of the same screen size. Monitor and display weight and depth are the most important factors in mount selection and must be validated to your specific device.

Monitor size is a diagonal measurement, usually in inches
Why weight and depth are the critical factors
Physics governs how monitor arms function. Two factors determine whether an arm can support your display:
1. Monitor or display weight: the monitor arm or mount must have sufficient capacity to hold your device's weight. Exceeding this capacity means the arm or mount won't hold position properly - your device will droop or drift downward. In extreme cases the device may fall.
2. Monitor or display depth (front-to-back): this measurement accounts for centre of gravity. A deeper device places more rotational force (torque) on the mount or monitor arm's pivot points. Even if two monitors weigh the same, the deeper one creates more stress on the mounting mechanism.
Think about holding a 5kg or 11lb weight close to your chest, versus holding the same weight with your arm fully extended - it takes more effort to hold the weight at a distance from your body. In this example, your body is experiencing rotational force, torque, on the elbow and shoulder. Monitor arms are affected in the same way.
Monitors that have the same screen size often share roughly similar weight and depth - but this is not universally true. They can have significantly different weight and depth, meaning they don't suit the same monitor arm. Hence the need to validate monitor arm and mount selection to your specific device.

How to measure monitor depth
Curved Vs flat monitors: why different capacities?
You'll notice many (but not all) Atdec monitor arms list different weight capacities for curved versus flat monitors. This isn't arbitrary - curved monitors extend farther from the mounting point due to their shape, shifting the centre of gravity forward and creating additional torque.
A curved monitor that weighs the same as a flat monitor often requires a higher capacity arm because of this geometric difference.

Note the shallow depth of these 27" flat monitors

Note the depth of this 34" curved monitor
How to check your monitor's specifications
Before selecting a monitor arm, locate these specifications in your monitor's documentation or on the manufacturer's website. A web search by manufacturer and model code finds this information quickly.
- Weight (without stand)
- Depth (with stand removed)
Most monitors list dimensions as W × H × D (width × height × depth), with and without stand - use the 'without stand' details.
Where to see Atdec monitor arm and mount specifications
Atdec monitor arms, preconfigured modular solutions, and mounts have detailed specifications on the product page. Scroll down to the Specs section and select Compatibility to see this data.
This example shows the technical compatibility details for AWMS-2-LTH75 heavy duty dual vertical mount, used to stack two monitors. It is popularly selected to mount two 49" ultrawide curved productivity monitors, or one 49" ultrawide curved monitor in the lower position with a 27" flat monitor above.

Note: where no specific maximum device depth is published, Atdec's curved display capacity is for overall depth 100mm (3.9").
We're here to help
Selecting the right monitor arm shouldn't be guesswork. If you're unsure about compatibility or can't find your monitor's specifications, our team is ready to assist with your specification needs. Contact us for expert guidance on selecting the perfect mount for your setup.
Remember: suggested maximum screen size provides a useful guideline; always verify your specific device weight and depth with your selected Atdec monitor arm or mount to ensure compatibility and safe operation.