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Discussion Starter · #8 · (Edited)
the whole reason I'm asking is upstairs BR think they cut out window and put in French doors found this when we had "national window replacement " company come put in new replacement doors 2-1/2 months later locks are not lining up/working took crow bar raised up middle where hinges are and door locks work. While I had crow bars in pounded another spacer in locks work fine (for now) I am thinking that these doors need a header underneath them. would I be correct? or is my thinking that 12 X 10 is NOT enough to hold this steel set of doors up?
 

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My span chart says that an SPF 2x10 that is just strapped can span about 12' 6" (I say about because it's in metric) and strapped and bridged it can span a little over 14'. 16' can be spanned by 2x12 @ 16" oc bridged and strapped, or 2x12 @ 12"oc strapped only, or bridged only (or bridged and strapped obviously)

It all assumes No1 SPF
 
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