THOMASVILLE, NORTH CAROLINA (REUTERS) - In a town where a 30 feet (9m) tall chair is the chief landmark, and which is synonymous with a US furniture industry decimated over the years by imports from China, many greet the possibility of tariffs on Chinese goods with a shrug.

No wonder. Of three once bustling Thomasville furniture factories in the city limits, one is being demolished and cleared for parkland, another may become the site of a new police station, and a third is being converted into apartments.

President Donald Trump is threatening to levy tariffs of up to 25 per cent on US$500 billion (S$683 billion) of goods imported from China each year, including roughly US$20 billion of furniture, as a way to bring back hundreds of thousands of manufacturing jobs lost to China and other low-cost competitors.

Yet, the transformation of US industries since China's emergence as the world's low-cost producer almost two decades ago means many no longer directly compete with Chinese imports, so tariffs may not translate so easily into more US jobs.

At family-owned Bernhardt Furniture, executives say it would take about US$30 million in capital investment - some 10 per cent of annual sales - to resurrect standard wood furniture lines now mainly made in countries such as China and Vietnam.

That is too much to commit based on a policy that a future administration could reverse.

"The theory is you turn (imports) off, the jobs come back. That's not really true... The buildings don't exist. The people don't exist. The machinery does not exist", to make the sort of furniture that now gets imported, said Mr Alex Bernhardt Jr, chief executive and the company founder's great-grandson.

What the company needs now, executives say, is the open markets and steady economy that have allowed it to grow its workforce from below 800 at the end of the 2007-2009 recession to almost 1,500 today - partly on the basis of exports to China.

That growth has been largely driven by demand for more customised, higher-end furniture. In expanding, the 129-year-old company has been hiring not only factory workers, but also designers, marketing experts and other professionals. In all, it is a different firm from what it was three decades ago when it first began dividing product lines between the United States and Asia.

Economists say the same is true across much of US manufacturing. To invest and hire more workers, executives would need certainty, for example, that consumers would prefer US-made products at a potentially higher price. They would need confidence that tariffs would last beyond the Trump administration and that production could not be moved to other more cost-competitive countries.

Even then, there may be little incentive to go back to old product lines for industries that have changed dramatically because of globalisation.

Across the Rust Belt and the former factory towns of the south, the transformation is apparent. In Buffalo, an old steel mill is now a solar panel factory, and a retail goods manufacturer now houses an office and restaurant park. In Cleveland, a shuttered GM plant has reopened as a Chinese-owned auto glass company. Abandoned factories throughout North Carolina have landed on the Environmental Protection Agency's list of "brownfield" sites that need cleanup.

Some companies are considering moving production from China as a result of the tariffs, but the jobs are unlikely to head home.

Illinois-based CCTY Bearing, for example, said it planned to move US-bound production from Zhenjiang, China, to a new factory near Mumbai in India to keep labour costs down.

JLab Audio's China-made Bluetooth products are not being taxed yet, but its chief executive Win Cramer had been scouting for suppliers in Vietnam and Mexico.

"I would love to build products onshore, but consumers have proven time and time again that 'Made in America' isn't as valuable a statement as it once was," Mr Cramer said. "They make decisions based on the cost."

The price of, say, its Bluetooth earbud would jump from US$20 to as much as US$50 if it was made in the US, Mr Cramer said, far more than what tariffs would add to the cost of imports.

To be sure, early reactions suggest that foreign companies that make US-bound goods in China may move some of that production to the United States. Still, countries such as Vietnam may ultimately benefit the most from Mr Trump's tariffs.

Japanese construction and mining equipment maker Komatsu has said it has already shifted some of its production of parts for US-built excavators from China. Part of that production moved to the US, but some also went to Mexico and Japan.

In South Korea, LG Electronics and its rival Samsung Electronics are considering moving parts of US-bound refrigerator and air conditioner production to Mexico, Vietnam or back home, but not to the United States, according to company sources and local media.

The responses to Mr Trump's tariffs on steel and aluminium show how such steps create both winners and losers.

Producers such as US Steel and Century Aluminium have said they will add at least several hundred jobs as a result of the higher prices they can charge. Mid-Continental Nail, however, laid off 130 workers because of those higher steel prices, and furniture parts maker Leggett & Platt has warned that rising metal prices would prompt it to move production abroad.

So far, Washington has imposed duties on US$250 billion of Chinese imports and Mr Trump has threatened to slap tariffs on all Chinese goods.

Many economists project new tariffs would on balance either slow down hiring or cause job losses in a manufacturing sector where employment has grown by 10 per cent over the past eight years without special protection.

The furniture industry, among the hardest hit by Chinese imports, has added 43,000 jobs since its employment hit a low of 350,000 in 2011, helped by the recovering housing market and strong consumer demand.

Industry officials say skilled upholsterers and other workers are hard to find, echoing the Federal Reserve's concern about the impact of worker shortages on the US economy.

In Thomasville, few expect that tariffs will bring furniture manufacturing back to its heyday, nor does the community need it, said city manager Kelly Craver, whose parents worked in the furniture and textile industries.

Since the recession, Thomasville has become a residential hub for growing nearby cities such as Greensboro and Charlotte. It also has its own mix of manufacturing and white collar jobs. Mohawk Industries recently expanded its Thomasville laminate flooring facility while the Old Dominion Freight Line transportation firm and the fast-growing Cook Out burger chain have corporate headquarters there.

"We, for the very first time in this city's existence, are going to have a diversified economy," said city manager Ms Craver.