Beefing Up Attic Joists for Living Space - JLC Online
2011年10月1日 · The existing ceiling joists are 2x6s, clear-spanning about 11 feet 3 inches. Rather than sistering in deeper members, which would involve moving wiring, can I stack new 2x6s on top of the existing ones? This creates a 2x12 joist depth, but will I achieve an actual structural benefit from stacking members?
Stacked lumber - The Building Code Forum
2012年8月6日 · If a single 2x6 is within allowable span then look at the load, assess its' magnitude and its' location in relation to the support below. If the HVAC's load is out in the span and greater than design load, engineer it. If the HVAC weighs less than design load for the single joist, or, if the unit is over a support that upper 2x6 is just blocking.
How to Reinforce Ceiling Joists to Handle Heavy Loads
You could install an UPSET beam down the center in the attic. Bearing the new beam on the end walls, install joist hangers on each of the 2x6 ceiling joist (one on each side of the new beam) to reduce the span and increase the load capacity of the attic space.
stacking 2x4s or sistering joists? - DIY Home Improvement Forum
2012年3月11日 · Not enough information is provided to determine whether a 2x8 is adequate, but if a 2x8 floor joists was adequate, it would be better to sister a 2x8 joist to the side of the existing 2x4.
Bracing 2x6 floor joists - Home Improvement Stack Exchange
2017年6月27日 · Sistering a 2x8 joist to your existing 2x6 joists at 16" oc will work. However, I'd use a No. 1 grade rather than No. 2 & better. The Code requires a minimum of 40 lbs. per square foot live load and I'd assume about 15lbs. Per square foot dead load for a total design load of 55 lbs. per square foot.
Stacking ceiling & attic joists - DIY Home Improvement Forum
2023年10月8日 · First sistering the attic 2x4 with 2x6. I need to create a drop ceiling below for electrical and drywall. If I stack sistered 2x6 below the sistered 2x4/2x6, essentially making a 2x12.. will that be sufficient for living space? I will also add either a single 2x6 or sistered 2x6 in between the 24" centers to create 12" centers.
Old House, 2x6 joists - Fine Homebuilding
2023年9月4日 · With current 6" framing height, at best, you can achieve a doubling of floor stiffness and strength, by completing the sistering as better-than added 2x6. Place longest-possible 2x3s below the leveling 2x4s. Shim between the 2x4 and 2x3 if you wish, to make a flat and level new ceiling plane. The new plane might be with 6 1/2" beam height.
How to properly double on ceiling joists - Home Improvement Stack Exchange
2017年3月28日 · Goal: Reinforce the joists and lay down a wood subfloor (OSB, ply, etc.) so I'm not tiptoeing on joists whenever I'm up there. Plan: "Sister" or double the ceiling joists with 2x6's or 2x8's with the ends resting on the wall top plates then lay the subfloor on the new joists.
beefing up 2x6 ceiling joist for heavy loads - Fine Homebuilding
2010年10月25日 · What I would do is to add a 2x4 to the top and bottom of each joist, using glue and structural screws to convert each joist into an I-joist in place. You could even possibly introduce a good crown to each by holding the bottom chord in place with a slightly long 2x4 post under the center as you install it.
Stacking attic & ceiling joists
First sistering the attic 2x4 with 2x6. I need to create a drop ceiling below for electrical and drywall. If I stack sistered 2x6 below the sistered 2x4/2x6, essentially making a 2x12.. will that be sufficient for living space? I will also add either a single 2x6 or sistered 2x6 in between the 24" centers to create 12" centers.
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