To placed a 8ft post 4x4 inches. How much concrete would I need to fill it with.?

Question

This would be a pvc post.

Answer 1

This will depend on what you plan to do with the post. If it's standard fence post and your using PVC fence I would use 1 80# bag. If the post will be used to support the weight of a gate I would go with at least 2 bags and 2' depth of burial. As DIY Doc stated it will depend on soil conditions etc. Hey Doc An 80# bag is equal to 2/3 cubic foot.

Answer 2

With no offense at all; it might depend on a few factors.

Reason for the post? FENCE? Height perhaps of a fence, determined by codes? Frost line? Size of the hole; and it's depth? Substance of the soil you wish to bury the post in?

Example: an 8 ft. treated 4 x 4 buried for Stockade Fencing at 4 x 8 is usually buried at 2 ft, Concrete; depending on bag size ( 60 or 80 lbs.) matters in that an 80 lb bag produces about 2 CU FT of FILL.

A fence post is most often allowed less than ground level for support substances; simply to back fill with soil; to allow grass growth.

Steven Wolf
Miles of fence

Answer 3

Escavate the hole slightly bigger then the post. One bag of post mix will suffice, This is a dry ready mixed concrete material which you add water to once poured into the hole.

Answer 4

figure one 80 lb bag per post,you will probably have a little left over, i wouldn't recommend it if you live in a climate where it can freeze,water will get in there and crack the PVC.

Answer 5

about 1 bag of cement will do just fine unless your doing the inside as well you know to fill it up and make it stronger then maybe 2

Answer 6

hey diy doc...2/3 of a cu. ft. not 1.5 as you have stated before and not 2 cu.ft. as you just stated...get it right

Answer 7

I depends on how big you make the hole