Bothered by lingering economic uncertainty, assemblers are taking a wait-and-see attitude toward capital equipment investment next year.

The Assembly Top 50 devoted $110.6 billion to capital expenditures in 2010. That’s 9 percent more than they spent in 2009, but it’s 21 percent less than they spent in 2008. Only 15 of the Top 50 spent more on property, plants and equipment in 2010 than they spent in 2008.