Tennessee BC-B, C Combined Commercial/Industrial Contractor

Per IBC 2301.2 lumber sizes shown on drawings are deemed nominal unless specifically designated as actual, but per IBC 2304.2 computations of required member sizes must be based on net (actual) dimensions.

Per IBC 1610.1, walls in which horizontal movement is restricted at the top must be designed for at-rest pressure, while retaining walls free to move and rotate at the top—and (by exception) foundation walls extending not more than 8 feet below grade laterally supported at the top by flexible diaphragms—are permitted to be designed for active pressure.

Field-cured specimens stay on site under the same conditions as the placement and may be used to determine when it is safe to remove forms, while acceptance strength is determined from laboratory-cured cylinders tested under ASTM C39.

Per IBC 2207.2 the registered design professional indicates on the construction documents the joist/joist girder designations, end supports, anchorage, bridging design differing from SJI specifications, bridging termination connections and uplift/lateral bearing connection design, while per 2207.3 the manufacturer designs the joists for those stated loads and submits sealed calculations plus connection design for connections differing from SJI, field splices and joist headers.

Per 29 CFR 1926.757(b)(1), each end of a "K" series joist requires a minimum of two 1/8-inch fillet welds 1 inch long (or two 1/2-inch bolts or equivalent), whereas the larger 1/4-inch by 2-inch welds apply to "LH" and "DLH" series joists and joist girders.

Per IBC 2902.2, separate facilities are not required in business occupancies with a maximum occupant load of 25 or fewer (Exception 4) and in mercantile occupancies with a maximum occupant load of 100 or fewer (Exception 3); Exception 2 uses 15 or fewer for any structure or tenant space.

A retention pond is an excavation that holds water continuously, often where there is a natural source such as a spring, and is frequently a landscape feature, while a detention pond holds overflow water until it is absorbed or evaporates and is dry much of the time.

B-B Plyform®, sanded both sides and mill oiled, can be reused 5 to 10 times, while an HDO-overlaid surface will normally produce 20 to 50 reuses or more with reasonable care.

A contact splice places the spliced bars in contact and is preferred because it provides more strength, while a spaced-lap splice places the bars apart without contact with center-to-center spacing that must not exceed 6 inches.

Per IBC 2308.5.10, bored-hole diameter shall not exceed 40 percent of the stud depth in bearing walls, with the limit increased to 60 percent in nonbearing partitions.

Pipe ramming is used most often when the pipe is large and distances are less than 150 feet, while directional drilling is practical for tunneling up to 2,200 feet for pipe 16 to 36 inches in diameter; pipe jacking suits small to medium pipe and short distances, HDD is favored for long city runs, directional boring with a pneumatic mole handles pipe up to 6 inches for 50 to 150 feet, and pipe bursting/sliplining are replacement methods for existing pipe.

Direct construction costs are the labor, material and equipment tied to a specific trade or phase (pipe materials, backhoe rental, pipe bedding aggregate), while direct (job) overhead costs result from taking a particular job but are not tied to a trade or phase—such as traffic control (barricades, flaggers, lane delineators) and pipe/soil density testing.

Beam sides built of lumber require 2x4 vertical cleats at 2' to 2'-6" on center, while plywood sides eliminate the cleats and use 2x4 vertical stiffeners instead.