Firefighters are still mopping up after a stubborn blaze broke out at a pallet-fabricating firm in the city's northwest early this morning.

Lonestar Lumber caught fire near 168 Street and 128 Avenue, sending flames shooting about 12 metres into the air at one point, fire officials said. The business was destroyed.

The first call came in at 3 a.m., and many as 14 firetrucks and 60 firefighters were deployed.

Fire department spokeswoman Laura Ruddock said that while a lot of smoke remains at the site, nearby businesses have not been evacuated.

"The building is surrounded by wooden palettes, which is fuel for fire in a lot of cases," Ruddock said. "There was concern when we first got here that this could become much bigger than it did and spread very quickly.

"We do expect to have crews on scene probably until late this evening working to get that fire completely out and then our investigators will go in to work to determine the cause of the fire as well as the total damage during this blaze, and that means it will probably be on scene for another day or so."

Earlier in the day, district fire Chief Doug MacDonald called the blaze "just an incredible fire load, it's all wood. There were two propane tanks on site that required the support of hazmat [hazardous materials specialists]."

No injuries have been reported.