The present disclosure relates to a method and system for forming and laying out a substantially perfect ninety degree angle that is used to form the corner of a construction footprint.

A system for building layout includes a moveable marking device that can be placed on vertical batter boards and remotely controlled into a position on the batter board to indicate the height of a top of a building foundation. The moveable marking device may also be placed on horizontal batter boards and remotely controlled into a position to indicate a position on the horizontal batter board where an extension of a building edge intersects the horizontal batter board. The moveable marking device may also be placed on foundation form boards and remotely controlled to indicate a position on the form board that relates to the location of a feature in the building.

A string holder for use with concrete forms comprising a main body having a central portion and first and second wing type portions that are coupled to the central portion. The central portion includes a first axial arm extending in a first direction and a second axial arm extending in a second direction opposite to the first direction, wherein the first axial arm has formed thereon one or more grooves sized and dimensioned for accommodating a string. The first wing type portion and the second wing type portion are angled relative to the central portion and extend radially outwardly therefrom. Each of the wing type portions includes a radial arm and a further axial arm.

A method using a surveying device 200 and a survey target device 300 includes: performing benchmark measurement including measuring an altitude of a benchmark that serves as a reference height of a batter board; performing stake top measurement including measuring an altitude of a stake top of a batter board stake installed; and performing beam top position display including calculating a difference in height from the stake top of the batter board stake to a beam top based on the reference height of a foundation stored in advance, the altitude of the benchmark, the altitude of the stake top of the batter board stake, and displaying the difference on a terminal device 100.

A method uses a surveying system 1 including a surveying device 200 and a terminal device 100 communicative with the surveying device 200, and includes: acquiring an altitude of a benchmark serving as a reference height on a batter board; acquiring a first altitude difference between the benchmark and a current ground line; acquiring a second altitude difference between the current ground line and a beam top position on the batter board stake; acquiring an altitude of a stake top of a batter board stake installed, by measuring the altitude of the stake top; calculating a third altitude difference between the stake top of the batter board stake and the beam top position based on the altitude of the benchmark, the first and second altitude differences, and the altitude of the stake top; and displaying the third altitude difference on a screen unit of the terminal device.

A clamp for securing a brick line is disclosed. The clamp comprises two jaws that are spring biased towards one another to enable a brick to be gripped between the two jaws. Each of the jaws is provided with an anchoring point to which the line may be securely fastened.

The adjustable batter board may comprise a first clamp, a second clamp, a hook, and a position adjuster. The adjustable batter board may removably couple to a horizontal crosspiece of a batter board via the first clamp and the second clamp. A string line may be removably coupled to the hook. As a non-limiting example, the string line may designate a layout line of a construction project. The position adjuster may be operable to move the hook laterally in order to position the string line. A plurality of jam nuts may be operable to lock the hook into position.

A corner block for supporting a builder's line mounted between posts is described, the corner block comprising a body for receiving the builder's line in use; a pair of gripping members, each gripping member having a gripping face engageable with surfaces of one of the posts in use; and a magnet mounted in the body so as to be associated with at least one of the pair of gripping faces, wherein the magnet has a magnetic force sufficient to attract it to the material of the post to which the gripping faces are applied in use.

An a masonry corner jig includes a main elongate body including first and second portions extending from a midpoint, the main elongate body forming a plurality of apertures extending a length of the main elongate body at the midpoint; first and second legs; first and second L-shaped plates each defining a central leg bracket; an adjustable grade stake; a metal plate defining a base; first and second legs each including a leg hinge, a leg rod, an adjusting rod, the adjusting rod forming hole through the center of the adjusting rod, an adjusting pin that is sized and configured for engaged passage through the hole of the adjusting rod, a cylinder defining an ankle rod, and a foot plate that is sized and configured for attachment to the first end of the ankle rod.

An a masonry corner jig includes a main elongate body including first and second portions extending from a midpoint, the main elongate body forming a plurality of apertures extending a length of the main elongate body at the midpoint; first and second legs; first and second L-shaped plates each defining a central leg bracket; an adjustable grade stake; a metal plate defining a base; first and second legs each including a leg hinge, a leg rod, an adjusting rod, the adjusting rod forming hole through the center of the adjusting rod, an adjusting pin that is sized and configured for engaged passage through the hole of the adjusting rod, a cylinder defining an ankle rod, and a foot plate that is sized and configured for attachment to the first end of the ankle rod.