Shop Door apron

[Snobdds]

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

 

[M5farms]

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 ﾗ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

you need bigger post or smaller holes

 

[downsizingnow48]

I would make the apron 48-60".

 

[rhunt]

I'm with Eddie on the weight of the bags, 50#. Bob

 

[Redlands Okie]

Drill holes and install rebar into existing concrete. Epoxy them in or at least drill every other hole at a different angle to help the rebar bite into the existing slab and not work its way out. Put REBAR in your new pour. At least on the edges.
As several have said..........
Smaller bags less work so to speak.
Buy several sacks extra.

If you have the slightest bit of doubt on the apron not being long enough then check your measurements or just pour a longer one. Your doing a lot of work so why skimp on a bit extra concrete. Do it right the first time.
Premixed concrete from box stores is hard to get a good broom or smoother finish on so throw in a sand mix bag with every other concrete bag or maybe 2 concrete and one sand mix.
Cooler weather is a win win. 90 F or such makes it a interesting issue. So in summer time start early if you can.
They make expansion joints of different kinds. Available at box stores or your contractor supply house. Go for a half inch thick something.
Thicker edge on the area where your equipment drives onto the approach, does not use a lot more concrete and helps a lot on strength. .

CONGRATS ON THE NEW SHOP