How can I widen an attic opening from 24 to 48 while ensuring the integrity of the truss that needs to be cut and using a block to attach it to the other trusses?
Asked by Eva Olmos 
1 month ago
Last Updated: October 9, 2024
Hey, I could use some assistance here. I’ve been trying to figure this out on my own, but I’m not getting the answers I need from my search. So, here’s the deal…
I want to make the attic opening bigger, going from 24” to 48”. The trusses are spaced 24” apart. In order to make this change, I know I’ll have to cut one of the trusses (check out the image below).
How can I make sure that the truss remains sturdy after I cut it? Would using a “block” to connect it to the untouched trusses work?
Thanks in advance for any advice you can offer.
Is that Mike Holmes’ page?
Supporting the truss is crucial before cutting to prevent a collapse. Consider using braces and friends for temporary support.
By the way, if you’re fortunate and the entrance is adjacent to walls, you can skip the wedge boards and opt for blocking just like the person did in that video. https://youtu.be/XoC4a0Iz8KY?si=x5uZcGSGPkEYHyM8
https://youtu.be/KmJRow_BqqY?si=aqeoUCPMBoLaR-h7
Hey there , I see you have a very organized way of handling things. While it may work well in many cases, some engineers might have concerns. The video showing the attachment of cut trusses to non-structural walls seems a bit risky to me, despite the logical process behind it. It’s definitely something to think about. As someone with a background in architecture and engineering, I’ve encountered situations during construction where modifications needed expert intervention to avoid potential issues down the line. Sometimes what seems straightforward can lead to unforeseen complications. Just something to consider.
Hey Mark, just wanted to take a moment to appreciate your thoughtful reply. It’s always great to hear different perspectives and I truly value your message. When we take the time to truly listen and understand each other, that’s when real learning happens. Your positive and informative approach in your response didn’t go unnoticed. Not everyone takes the time to be kind and helpful in online discussions, so kudos to you for setting a great example for others to follow!
I’m talking about that big white post in the front near the willow trees. It’s typically used to support the front part of a home’s trusses.
Make sure to attach a 2×6 from the joist to a rafter on both sides of where you plan to make the cut. After cutting, remember to block it by cutting out enough space to accommodate the block.
To expand the access door, cut the bottom part of the truss while being supported by wedges below. Be cautious not to displace them.
Trusses are typically shaped like a pyramid with top chords meeting at the peak and bottom chords labeled as B. Get help from others for safety.
What’s the reason for wanting to widen the attic hatch?
Create a box for it. There are certainly some helpful images on Google.
Maybe it’s not a good idea to do that. The attic may not be able to support what you want to store there in terms of weight or other factors. Once the hole is made, you’ll need to install stairs and a door.
This is impossible.
https://sbcindustry.com/content/1/cutting-trusses#:~:text=Answer%3A,or%20a%20licensed%20design%20professional.
Hey Tom, just wanted to ask a few questions and share some thoughts with you. Please don’t take my response the wrong way, I’m genuinely curious to hear your perspective. I value learning from people of all ages and backgrounds, which is why I always have a woman working with me – they bring a unique perspective and come up with some amazing solutions! I love hearing about others’ experiences and insights, so let’s start the conversation!
I’ve noticed these large access holes in houses and wondered how they’re able to add them without compromising the structure. The boxed-out access holes are similar to how decks, stairs, and other structures are added in the middle of a house. The bottom chord’s role is crucial in keeping the walls together and supporting the interior ceiling. Removing a small portion of the bottom chord may not significantly impact the load of the roof, especially if additional boards are added to reinforce the trusses. The box essentially acts as extra support, distributing the load across multiple bottom chords
At work, they always say, “‘t mess with a truss.” – .
Tom always gives great advice! 😂🤣 My wife always warns me not to meddle with things, but somehow I always find myself in trouble when I do! 😂😂