![]() ![]() The following are price estimates of rebar products based on the current market price of steel and a reasonable markup from raw steel to retail rebar product. Calculadora de Barras de Refuerzo (Spanish Version).Engineering specifications of a lapping factor should always be applied. The length of the lap is specified by a "Lapping Factor (LF)" which is often 40 or 60 times the diameter of the rebar. This process is called lapping, and the length of the overlapping rebar is the rebar lapping length. When the dimensions of a slab, wall or other form exceed the length of a single stick of rebar, it is required to overlap and tie rebar pieces to create the added length. The most common lengths of pre-cut rebar in the United States are 20`, 40' and 60'. Based on this and the density of steel used in rebar, the Rebar Size Table contains reasonably accurate specifications of rebar linear weight and lateral (face) area based on rebar size. Therefore, size 4 is 4/8 th of an inch, which is 1/2", and size 8 is a full inch in diameter. In the United States, rebar sizes are in increments of 1/8 th inches in diameter. Note: guage is not a correct term for rebar. Size - the indicator of the diameter of rebar sticks.There may be more than one mat with space in between mats. Mat - a crisscross grid of rebar sticks.Lapping Factor - the multiple of a rebar diameter used to specify appropriate rebar lapping length.Lapping - when two sticks of rebar are overlapped and bound together.In the U.S., the most common lengths of rebar sticks are 20', 40' and 60'. Multiple parallel grids, at uniform space intervals, are referred to as rebar mats. The grids have spacing between the rebar rows, and they are placed within the concrete form by a specified inset from the edge of the concrete. Rebar is laid out in grids, crisscrossed patterns of rebar, tied at the intersections where runs of rebar touch. Carbon steel is the most commonly used material for rebar, which may also be coated with zinc or epoxy resin. This all has the net result of substantially added tensile strength when rebar is part of the concrete form. Rebar and concrete expand similarly with temperature variations. When the concrete has hardened, the concrete around the rebar ribs keep the rebar in place. Rebar is put in place before concrete is poured. Rebar is a roughly circular steel bar with ribs used to provide added tensile strength to concrete structures. rD = Rebar diameter (a function of the rebar size.However, this can be automatically converted into other length units (e.g. Lapping Length (LL): The calculator returns the length of rebar lap in inches. The Rebar Lapping Length calculator computes the length overlap needed at rebar joints. just some general knowledge (which I have discovered isn't so general!). So I wasn't fishing for "free engineering". The closer I can get to a "correct" design and call-out the least amount of time and effort it'll take the experts to change. My question here is for my own education, the work I've done is already out the door (where I used the 30x dia.s). And I'm sure you'll agree it's easier to change something that is existing rather then start something from scratch. ![]() ![]() I take my best shot at it, BUT I point out to my bosses that my work needs to be checked by someone that KNOWS WHAT THEY ARE DOING!!!. material procurement, estimating, Xerox machine repair, AND civil and structural design. I now work for a small engineering firm where I'm pressed to cover other bases. BUT I'm better then a "monkey see monkey do draftsman". Now I'm the first one to point out I am not expert in these other disciplines!. During that time I've had to "bump" up against other disciplines and got to get a "feel" for what they do and how. To explain, my discipline is process piping. ![]()
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