A string groove masonry clamp having a clamp body with first and second clamp sides pivotally connected together and biased to clamp onto a masonry block to align a string positioning guide having a string groove at the edge of the apex of the corner of the block.

The present invention relates to a device for connecting and separating masonry units, preferably bricks, which comprises a tubular body that fits the tubular shape of holes in the bricks. The device for connecting and separating comprises a portion that has a straight cross-section larger than the cross-section of the tubular body and disposed approximately midway along the length of the connector device, for separating the bricks that said device connects. The device also comprises at least one depression or channel along the entire length of the tubular body, the depression or channel acting as a spring. The connector allows walls to be assembled using only bricks and connectors so as to apply mortar ex post.

An apparatus for forming a concrete column is disclosed. The apparatus may include a first column form half and a second column form half, which may be designed to be fitted together. The apparatus may also include a fastening system having at least one brace and a plurality of straps to fasten the first column form half with the second column form half to form a full column form. The full column form may then be filled with a poured concrete mixture, which when hardened or cured, may be a concrete column used in any number of structural or design applications.

The adjustable guide line holder is a mason's guide line holder, including a housing having an adjustable longitudinal width for secure reception within a brick pocket of a gable. The housing includes outer and inner portions respectively having first and second sets of top, bottom and side walls. The inner portion is received within the outer portion such that the first and second side walls are longitudinally opposed with respect to one another, with the inner and outer portions being adjustably slidable with respect to one another such that the housing has an adjustable longitudinal width. A vertical support is received within the inner portion and extends between the top and bottom walls thereof. A cross member is mounted to the vertical support, such that one end of a masonry guide line may be secured to the cross member.