Headers Stair Opening

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Posted by: from Toronto
12/23/2022 at 8:35:45 PM

We had a home inspector mention the header and trimmers at the stair opening should be doubled. The plans say all lintel 2 ply 2x10, this has passed inspection so not sure if this is a code issue?

It is a lvl on one side. Don't know if that makes a difference? Looking for opinions before we address with the town inspectors.

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Marcelino from Handy Marcy in Brampton
Date/Time12/23/2022 at 9:21:32 PM

Can you clarify when you say home inspector - do you mean inspector when you wanted to sell the house or inspector from the city?

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Taylor in Toronto
Date/Time12/23/2022 at 10:04:06 PM

It was a home inspector reviewing the home...the city inspection passed (however they passed a lot of things they shouldn't have)

Headers Stair Opening
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Ricardo from FGC in Pickering
Date/Time12/23/2022 at 11:05:37 PM

Hi Taylor in my experience as a framer I always doubled the header or trimmers around stair opening and sometime we use a triple all depend of the spans it's a good framing practice and also its a code.

The OBC said in article (1) header joists around floor opening shall be doubled when they exceed 1.2 m in length. (2) the size of header joists exceeding 3.2 m in length shall be determined by calculations.

Article Said (1) trimmer joists around floor opening shall be doubled when the length of the header joist exceeds 800 mm.

(2) when the header joist exceeds 2 m in length, the size of the trimmer joist shall be determined by calculations.

As you can see it's a code

Hope you find this information helpful, if you have any questions please feel free to contact me Thanks Ricardo 289 423 4995

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Richard in Edmonton
Date/Time12/25/2022 at 12:21:49 AM

The previous respondent answered your question although the Code rule refers to dimension lumber. The header spans less than 1.2 m & is not required to be doubled. LVL lumber is much stronger than dimension lumber. You probably wouldn't exceed a micron of deflection unless it was supporting the entire structure above or perhaps if you parked a tank on it.

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Date/Time12/26/2022 at 11:16:27 PM

Framers always double headers and trimmers

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