For all the specimens, the failure angle ranged between (20-30 o ) with the horizontal plane. The spreadsheet is protected but with no password required. Tables and figures have been given adjacent to the required data cells in an attempt to self contain the calculations within the worksheet. L-Anchor Bolts, Scraper Blade Blots, Head Plow Bolts, Bolt Gauges. The spreadsheet is designed to find the strength of a determined anchor bolt or bolts within certain concrete parameters. The brittle type of failure of the unreinforced specimens changed to a ductile one with the presence of the steel fibres. Browse Bolts in the Fastenal catalog including Hex Bolt,Hex Cap Screw,Round Head. (6.4 mm) diameter anchors are permitted to be placed in mortar bed joints that are at least ½ in. The pullout capacity increases also with the addition of steel fibres and with the square root of the concrete compressive strength, which is an indirect measurement of the tensile strength of concrete. Anchor bolts are required to be embedded in grout, with the exception that ¼ in. The test results showed that the embedment depth has the major effect on the pullout capacity.

The steel fibres used were of the shelled type (Harex) with irregular cross-section type with an aspect ratio of 36.34. The studied variables in experimental programme included testing short headed anchors embedded in 72 pull-out specimens, with three embedment depths ( 25, 37.5, and 50 mm), three compressive strengths ( 45, 53, and 58 MPa), four steel fibres volume percentages ( 0.0, 0.4, 0.8, 1.2 ) and two anchor diameters (10, and 12 mm). This investigation studied the effect of steel fibres on the pull out capacity of short- headed anchor bolts embedded in high strength concrete.

Anchor bolt design spreadsheet