What Size Steel Beam Do I Need To Span 30 Feet

Nosotros are thinking of adding on to our house, 24' deep, 28 to 30' wide. The lower level will be garage infinite, and it would exist nice to non have postal service in between the parking spaces supporting a beam for the floor above. The beam would exist spanning the 28 to 30' width, so I can use 12' flooring joist for the 24' depth. The ceiling hight in the garage expanse will be 10 to 12' tall, so the hight of the I-beam wouldn't matter, as I can easily keep a 9' clear infinite beneath the axle. The floor higher up will be bedrooms and bathroom area, I do non remember the loads per square foot for calculations, been 20 years since I had to remember about it.

Any feedback welcome, simply in the brainstorming phase right at present, starting some sketches, to go materials estimated, and cost figured.

Brainstorming? (insomnia) My dwelling's main flooring is on 18" deep 2x4 'W' trusses 24" OC and interior walls are net 27' apart above where they span. There is no beam, and there's a raceway for the HVAC plenum down the truss centers. Family unit room below is 18' x 27' with no posts or beams. ('residential height' ~ 7' half-dozen" to suspended ceiling. (pics on request .. )

The steel beam proposed I'd estimate to be all 12" or more unless say two set up spaced for 8' joists above or other combo. (Information technology/they could be between vs under joists if you add a lintel(s) to the lesser(s). Door header need non be below them but needs considered depending on which wall gets doors and their sizes/clearances. Ceiling might be higher than the bottom of a beam under joists (assuming 12" & 12"). Exercise check with an engineer, familiar pal/dealer almost options/possibilities for such trusses, beams, lintels, etc (16" OC surely spec'd) vs simple joists & beam and compare costs of all the bits each thing considered.

Ease of pluming/wiring facilities above/thru trusses (BTDT) is nice. Much to consider. Door header might could exist tripled joists if on the brusque wall vs welded upward or something. Doors on the long wall? 'W' trusses are hung past the

top

chord, so a header under their tails would o'lap nearly their full depth/height. (my garage'south ceiling and door header are trussed.)

Your building inspector/dept might refer you to someone for advice to their 'er liking (certain to greenish tag first insp). There are ways ... and I apologize if I added confusion to a process whose method has been pretty much decided.

Oh, and my guess on the axle 'depth' was based on a 28' wide ten 82' modular dwelling setup. Going from 4" x eight" to 4" x 12" steel to bridge the four main 'runway' (~27') was approved to eliminate all posts. (Going from 4" to six" wide beam would mean more of its own weight/load to carry, to install, and +$$). Garage, entry from narrow end, is 27' ten 30' and adjacent family unit room is 27' 10 xxx.v'. btw, For o'all ceiling height one 'cross-axle' in each ceiling (4" x four" ten 28' showing) is cosmetically wrapped but non obvious/unsightly. tog

I accept to bridge the 28' distance because I cannot put one in the center to span the 24' distance, it would be in the eye of ane of the garage trophy. If I went that route, I would have to apply 2 beams 24' long,

I also doubt whatsoever major automotive repairs would have identify here, equally I accept a work Bay in the befouled already gear up with beam trolley and ii chain hoist. Non that I wouldn't listen, this garage would be bigger and nicer and warm and... and the wife won't let me! This is "her" parking surface area, I've already "junked upwardly the barn plenty".

Besides, we are out in the country, there is no inspection to worry well-nigh, but I, similar my father, desire to do things correct and tend to lean towards overkill... if information technology calls for a 10" axle, I volition likely become a 12" beam.

The 28 to thirty' wall volition have 2 garage doors and a human door, with center of the span catastrophe up about one/3 in from i edge of one of the garage doors. Not interested in having a header over the door support a 24' beam.

With the existing course, existing floor levels, the garage floor and ceiling volition take enough of room to allow a beam of adequate size and notwithstanding not hinder head room.

The floor over the garage will match upwardly to the existing second flooring of our firm, for smooth transition from current hallway to new department. Offset flooring has nine' ceilings, and is at to the lowest degree 3 feet above current class outside, and that will be even lower once leveled as needed for construction. I'm ok with high ceilings in the garage, I tin use the space for storeage, by hanging large shelves from the ceiling above, hence my 'overkill' building methods.

Beams quoted in post to a higher place are an inch dimension x weight per foot, right? What is the respective inch dimension, that is what would be most helpful to me at this bespeak of my design process.

Case: 'to span 30' equally described above, you need a beam that's xx" tall, yy" wide and weighs zz lbs per foot.'

Ballpark close enough, I'chiliad likely to oversize a chip anyhow, and double check that everything is proficient once I get further along. It could be some other twelvemonth before I even commencement this project.

What Size Steel Beam Do I Need To Span 30 Feet,

Source: https://www.tractorbynet.com/forums/threads/i-beam-size-30-span.351016/

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