How to Sister Floor Beams and Columns to Reinforce a Floor Level

By seashore

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first to sister a joist you need to make sure the one next to it is solid

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Instructions

Difficulty: Moderately Challenging

Things You’ll Need:

bottle or lolly jacks shims carrage bolts washers and nuts

Step1

cut sister joist so it hangs at least 2 feet over center beam

Step2

place new joist against sagging joist and place lolly jack upto both joists

Step3

jack both up so that all joists are level making sure not to go to high and causing floor to crack

Step4

place shims in all locations betwwen sub floor and top of joists

Step5

procceed to drill 1/2 inch holes every 16 inches so you can fasten joists together make certain to use washers so you dont pull through wood

Step6

recheck for a level floor then slowly lower jacks and recheck

Tips & Warnings

dont lift too much or you may buckle the floor causing stress on all other parts of the floor and walls

Comments

nanomatrix said

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on 9/24/2007 :) reading it again it seems easier the second time reading it... I just need to make sure the house doesnt fall on me when I do it...

seashore said

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on 9/6/2007 dont be discouraged you may be able to do this task it just may take some time since you havent done it before. maybe someone can help you at least just a second hand

on 9/5/2007 Thanks for posting this, perhaps I do not want to attempt this on my own, but I would not have known had I not read this... I was hoping it would be something simple like place a supporting beam next to the original beam and nail together. :) I was also considering raising a portion of the floor, but thats probably not realistic either. THanks for your article.

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