What size drill bit do I need for 1 2 inch concrete anchor?

Technical Specifications for Drop-In Anchors Size Minimum Embedment Drill Bit 3/8” 1-9/16” 1/2” 1/2” 2” 5/8” 5/8” 2-1/2” 7/8” 3/4” 3-3/16” 1” 1 more row

confast.com - Technical Specifications for Drop-In Anchors

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Male or Female Anchor? Female anchors would require the spotting of the anchor and then place th … Get the job done right the first time by using the best masonry anchors for the application. A mason …

Technical Specifications for Drop-In Anchors

There are numerous technical specifications that must be considered when using Concrete Drop-in Anchors. Considerations include diameter and material type, internal thread length, minimum edge distance and required hole size. The Concrete Drop-in Anchor is a great fastener option when working with flush mounting applications. The size of the Drop-in Anchor refers to the diameter of the standard UNC threaded rod or bolt to be used with this fastener. Once all these factors have been determined, you can find the expected holding values in the technical information below.

Length:

When setting the anchor flush with the base material: To determine the minimum bolt length required, add the internal thread length of the anchor, plus the thickness of the material to be fastened, plus the thickness of any washer to be used.

When setting the anchor deeper into the concrete:

Determine the minimum bolt length above and add the additional depth to the minimum anchor length.

Spacing:

The forces on a Drop-in Anchor are transferred to the material in which it is installed. If the anchors are installed too close together, it can cause an interaction of the forces, thus reducing their holding power. Minimum anchor spacing and minimum edge distances for the drop-in anchor are as follows: Anchor Diameter Spacing Between Anchors Minimum Edge Distance 1/4" 3-1/2" 1-3/4" 3/8" 5-11/16" 2-13/16" 1/2" 7" 3-1/2" 5/8" 8-5/16" 4-1/8" 3/4" 10-1/2" 5-1/4" When vibration or sudden impact is part of the load conditions, the spacing should be increased.

Technical Information: Ultimate Load Values in 2000 PSI Concrete

Size Minimum Embedment Max. Torque Drill Bit Pull-Out (lbs.) 1/4” 1” 5 ft./lbs. 3/8” 939 3/8” 1-9/16” 10 ft./lbs. 1/2” 1560 1/2” 2” 20 ft./lbs. 5/8” 3105 5/8” 2-1/2” 30 ft./lbs. 7/8” 3323 3/4” 3-3/16” 40 ft./lbs. 1” 6678 Values shown are average ultimate values and are offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally accepted as a safe working load. Reference should be made to applicable codes for the specific working ratio. Minimum embedment for satisfactory anchor performance is 4-1/2 bolt diameters. Deeper embedments will yield higher tension and shear capacity.

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Is sand a good base for gravel?

The gravel will work into the sand, but this is not bad at all (concrete is sand, gravel and a cement, 2 out of the 3). Two factors on how long it lasts before the sand does appear on top again will depend on water content, how much gravel is laid, how thick the sand is and compaction.

diy.stackexchange.com - Can I build a gravel driveway over sand?

There is a large quantity of sand where I would like to build a gravel drive. The sand is not super deep, only an inch or two at its deepest points, but I cannot find any quick way to remove it. Much of it is compacted as well. I was considering just dumping 4 inches of #8 gravel on top of this sand base, which like I said, seems quite stable even in the rain. My big questions are: Will dumping this gravel over the sand weight it down and stop the sand from blowing around when it gets windy? I'm trying to keep sand from getting all over my cars. Are there any inherent problems with doing this? (Note: I don't need this driveway to last forever, a couple years of life would be just fine)