Shop Door apron

[man00]

Just completed my 30x30x10 shop, need to add a apron in from of the door. I went online at Lowe's and talked to one of their chat people. I ask about how many of 80 pound bags would I need to do a 4" thick, 10' long and 30" wide took him about 10 minutes to get back..He said I would need 167 80# bags. I was thinking 20 at the most I told him..he said be best to get 175 bags and return what I don't use...heh

 

[Snobdds]

I come up with a little over 14, 80lbs bags for a 10'x2.5'x4'' pad. So get 15...

 

[RedNeckRacin]

Concrete Calculator - How Much Do I Need? | QUIKRETE(R) 217 comes up with 15, so i'd get two extra.

 

[Deere Dude]

I bet he was looking at 10' by 30' and not 30".

 

[man00]

thanks, I guess tar paper is okay to use as a in between of the shop slab and new apron. I tried fill dirt but I don't think it would hold up well over time. I hope 30" is wide enough so my mowers won't drag going in

 

[man00]

I bet he was looking at 10' by 30' and not 30".

Probably so..167 bags would be quite the load on 1/2 ton Chevy

 

[RNeumann]

Your math is off- think about the size of an 80# bag. It's about 2sf at about 4-6" thick. Your pour is 300sf so about 150 bags would do.

Another way to figure (and the normal way to Calc concrete) is by the yard. 30x10x.33 is about 3 3/4 yards.

 

[M5farms]

Your math is off- think about the size of an 80# bag. It's about 2sf at about 4-6" thick. Your pour is 300sf so about 150 bags would do.

Another way to figure (and the normal way to Calc concrete) is by the yard. 30x10x.33 is about 3 3/4 yards.

he has 25sq ft it is 30 inchs wide by 10' long

 

[hawkeye08]

You need volume, so 10'x2.5'x.33333' (10' long x 30" wide x 4" deep). I come up with 8.333333 cubic feet. 80# bag yields approx .6 cubic feet. You would need 13.88888 bags, round up to at least 14 bags.

Frost got under my apron (24" wide 4" deep) across the front of my shop and under the floor of the shop and raised up an inch and jammed my door so I could not open it. I would consider putting an edge deeper (if your shop floor does not already have deeper edge) to block frost (18" would work in my case).

Data sheet for quickcrete https://www.quikrete.com/pdfs/data_sheet-concrete mix 1101.pdf

It does not take much area that is deeper than 4" to require more bags. Either have extra quickcrete or gravel on hand to help fill if needed.

 

[Snobdds]

Your math is off- think about the size of an 80# bag. It's about 2sf at about 4-6" thick. Your pour is 300sf so about 150 bags would do.

Another way to figure (and the normal way to Calc concrete) is by the yard. 30x10x.33 is about 3 3/4 yards.

Um...I think your math is a bit off by a factor of 10x.

 

[man00]

I've never poured concrete before so it will be a learning experience for me and the wife. If it doesn't work I can always break it up and start over.

 

[Rustyiron]

There's very little "pouring" with 80# bags
Mostly mixing.

 

[RNeumann]

he has 25sq ft it is 30 inchs wide by 10' long

Yep I'm with your Lowes employee- wrong. It uncommon to mix units of measure which I assume what caught us. You guys who did catch this are right on- it isn't that many bags.

Sorry for adding to the confusion.......120"x30"x4" may help us construction folks.

 

[Al 2]

I came up with same answer as Hawkeye. 8.33 cu Ft. Around here I think the bags are 0.5 cu ft. so that means 16.7 bags. Possibly the guy at Lowes misplaced a decimal point and thought it was 167 instead of 16.7.
Al

 

[RedNeckRacin]

I've never poured concrete before so it will be a learning experience for me and the wife. If it doesn't work I can always break it up and start over.

Don't add as much water as you think you need if that makes any sense. Mix in a little water at a time, you do not want soup as that makes much weaker concrete. I will suggest finding the biggest mechanical mixer that you can find instead of mixing in a wheel barrow or a mud tub. :thumbsup: I would plan on adding in some rebar to help keep things together.

 

[EddieWalker]

Do not get 80 pound sacks, they wear you out. Get the smaller sized one, either 50 or 60 pounds each. They are within a penny per pound of each other and the difference in handling them is night and day. Two 80 pound sacks is what my concrete mixer can handle, so I put in three of the smaller sized sacks. It's all in the picking them up, cutting them open and then pouring them into the mixer that adds up to a lot of work when it can be done a lot easier with smaller sacks.

 

[boomer1025]

Drill the floor slab and installed 3/8 rebar to tie the apron to the floor. This way the apron won't heave up in the winter.

 

[randyswanner]

y'all better listen to the man at Lowe's I ain't done know figuring but I bet he closer than y'all **** it takes 3bags to do a fence post. sta dad concrete is 5300 to 6000 # a yard lightwight is at least 3 000 a yard is 27 cubic ft 10 ×2.5=25 sq ft ,÷ 3=to 8 and 1/3 cu ft so about a third of a yard without a footing lightweight would be about a 1000# ÷ 80= about 13 bags I first read that at 30 ft instead of in which is probably what he figured

 

[rustyshakelford]

y'all better listen to the man at Lowe's I ain't done know figuring but I bet he closer than y'all **** it takes 3bags to do a fence post. sta dad concrete is 5300 to 6000 # a yard lightwight is at least 3 000 a yard is 27 cubic ft 10 ×2.5=25 sq ft ,÷ 3=to 8 and 1/3 cu ft so about a third of a yard without a footing lightweight would be about a 1000# ÷ 80= about 13 bags I first read that at 30 ft instead of in which is probably what he figured

I literally have no idea what your saying.

Op, if it's not to much trouble, I would consider making the apron maybe a scunch wider. Anything that reduces the angle helps especially with mower decks getting hung up.

Brett

 

[EddieWalker]

One more thing to add. It's very rare to have the depth correct when estimating. Most seem to dip down a fair amount, which requires more material. If the online calculator says you need 14 sacks, get 16.