Yes, it is safe to burn sassafras and it is commonly burned in many locales.
Yes
They provide a raised spot for the fire, letting ashes drop below, and providing air circulation for the wood to burn.
If you keep adding wood, no time limit. A low fire, green logs, banking the fire, a maximum of about 6 hours.
Simple answer: No. Complex version: No freakin' way. That's a great way to burn your house down, give yourself carbon monoxide poisoning, or at least ruin the fireplace. It's not designed to burn any fuel but gas. Any number of things could go wrong if you put wood in there.
Various gum trees make for fairly decent fireword. Not as good as oak or hickory, but better than cottonwood pine or fir. Many species of gum are a pain to split, but once split burn OK.
No, it is not safe to burn. It is toxic.
Yes.
yes
Yes.
Yes.
Yes
yes. i don't think so
no it will catch a your house on fire
Yes, it burns very hot. Many find the smell unpleasant, but it is as safe as any other wood to burn.
yes. just be sure it is seasoned (dried) properly. that goes for any wood.
In MOST cases, yes- if the wood has not been treated with preservative chemicals.
Sassafras is a good source of firewood, because it is slow to burn and releases a pleasant fragrance. In the United States, the Food and Drug Administration has banned the use of sassafras in food and beverages because it contains safrole, an oil believed to be carcinogenic.