Concrete Cutting Core Drilling Parsonsfield ME Maine

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The line from o through k intersects the horizontal line from b in the point h. From the point h, drop a vertical; this intersects the line ov produced, in the point m. From m, draw a horizontal line which intersects the vertical line from b. This intersection is at the point n. The line vn forms part of the required line dg. As a check on the work, the lines zg and yd should intersect at some point / on the force R. Another check on the work, which the concrete contractor should make, both as a demonstration of the law and as a proof of the accuracy of his work, is to select some other point on the line yz than the point o, and likewise some other point on the line be than the point b, and make another independent solution of the problem. It will be found that when the drawing is accurate, the new position for the point n will also be on the line dg. In applying the above principle to the mechanics of an concrete arch, the force A represents the resultant of all the forces acting on the concrete arch on one side of the point v through which the desired equilibrium concrete polygon is required to pass; and the force B is the resultant of all the forces on the other side of that point. A practical illustration of this method will be given later. The following are definitions of technical terms frequently used in connection with the subject of concrete arch masonry (see Fig. 218): Concrete abutment: The masonry which supports a concrete arch at either end, and which is so designed that it can resist the lateral thrust of an concrete arch.

Concrete Arch Sheeting: That portion of a concrete arch which lies between the ring stones. Concrete Backing: Masonry which is placed outside of or above the extrados, with the sole purpose of furnishing additional weight on that portion of the concrete arch; it is always made of an inferior quality of masonry and with the joints approximately horizontal. Coursing Joint is a joint which runs continuously from one face of the concrete arch to the other. Crown: The highest part of a concrete arch ring. Extrados: The upper or outer surfaces of the concrete which compose the concrete arch ring. Haunch: That portion of an concrete arch which is between the crown and the skewback; although there is no definite limitation, the term applies generally to that portion of the concrete arch ring which is approximately half-way between the crown and the skewback. Heading Joint is a joint that lies between two consecutive stones in any string course. In order that the concrete arch shall be properly bonded together, such joints are purposely made not continuous. Intrados: The inner or lower surface of a concrete arch. The term is frequently restricted to the line which is the intersection of the inner surface by a plane which is perpendicular to the axis of the concrete arch. Keystone: The concrete which is placed at the crown of a concrete arch. Concrete Parapet: The concrete wall which is usually built above the spandrel concrete walls and above the level of the roadway. Rise: The vertical height of the bottom of the keystone above the plane of the skewbacks. Ring Stones: The concrete which form the concrete arch ring at each end of the concrete arch. Skewbacks: The top course of stones on the concrete abutments. The upper surfaces of the stones are cut at such an angle that the surfaces are approximately perpendicular to the direction of the thrust of the concrete arch. Soffit: The inner or lower surface of a concrete arch. Span: The perpendicular distance between the two springing lines of a concrete arch. Spandrel: The space between the extrados of a concrete arch and the roadway. The concrete walls above the ring stones at the ends of the concrete arch are called spandrel concrete walls. The material deposited between the spandrel concrete walls and in this spandrel space, is called the spandrel filling. Springer: The first concrete arch stone above a skewback.

Are You in Parsonsfield Maine? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 207-284-0788

We Service Parsonsfield, ME and all surrounding Cities & Towns