Home / Falls / Hay Stack Safety

Hay Stack Safety

A hay stack looks solid, yet it is thousands of pounds of material held up by friction and shape. Safety comes from planning how you build, work around and remove it.

Why do stacks need respect?

Hay stacks can be tall, uneven and heavy. Bales can shift as they settle, as moisture changes or as you remove them. Anyone climbing, working near or removing bales from a stack is exposed to falls and moving weight.

Stacks are also in places where children and animals like to play. A stack may look like a playground and behave like a hazard.

Every year, farm families are hurt by hay that seemed stable. The common thread is that nobody stopped to look at the whole stack before working near it.

What affects stability?

Several things change how a stack behaves: bale size and shape, how tightly they were made, how they are interlocked, the ground beneath, the weather and how the stack is removed from. A stack built on uneven or soft ground can lean over time.

Moisture matters. Wet hay is heavier and less stable. It is also a fire risk, and extension specialists can explain the conditions to watch for.

• Firm, level, well-drained ground.
• Consistent bale size and a stable pattern.
• Protection from rain and snow where possible.
• Regular checks for leaning or shifting.

What about fire?

Hay that was baled too moist can heat inside the stack and, in some cases, ignite. This is a known farm fire hazard, and extension programs publish guidance on how to monitor and respond. I will not give temperature numbers here, since the proper thresholds and steps come from those sources.

If you notice a strong odor, steam, a sunken area or unusual warmth, call your fire department and your extension office rather than pulling the stack apart yourself. Opening a heating stack can let in air and make a fire worse.

Fire departments appreciate a call early, before smoke appears. Many rural departments know about hay fires and would rather help than hear about a barn lost.

How do you remove bales safely?

Take bales from the stack in a way that keeps the remaining stack stable. Avoid removing the bottom or middle bales so that the upper ones overhang. Do not pull bales out from underneath someone who is standing on the stack.

Use equipment designed for handling bales and follow the operator's manual. Keep people clear of the loading path.

Avoid working alone when removing bales from a tall stack, and let someone know where you are and when you expect to finish.

• Remove from the top and the front in a stepped manner as extension guidance suggests.
• Never tunnel into a stack.
• Keep a clear escape route.

How do you work at the top?

Climbing on a stack is a fall risk, and the surface can be uneven and slippery. When possible, handle bales from the ground with equipment. If you must climb, use safe access, and do not work alone.

Be aware of overhead lines near stacks stored outdoors, and of the clearance for equipment that will load or unload.

A telehandler, loader or elevator is a better way to reach top bales than a ladder or a climb. Ask your equipment dealer about attachments.

• Use ground-level handling when you can.

How do you keep children and visitors safe?

Set clear rules and clear boundaries. Fence or mark the stack area, and teach children that stacks are not for climbing or playing. Programs such as the Progressive Agriculture Foundation offer safety education for farm kids.

Make sure hired workers and visitors know the rules as well, and supervise them.

Teens who help with hay should only do tasks that fit youth work rules. Confirm those rules with the U.S. Department of Labor and your state.

• Fence or flag the area.
• Teach the rule once and repeat it.

What if there is an accident?

If someone is trapped or injured by a shifting stack, call 911 at once. Do not climb onto an unstable stack to try to help. Give the dispatcher your exact location and watch for the arrival of responders.

After the event, review how the stack was built and managed, and adjust your approach.

Once the emergency is over, take photos and notes, and discuss with your insurer if needed.

Last reviewed: November 12, 2026. Written by the Farm Safety Editorial Team. See our editorial policy.