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FIGS. 15, sixteen and 17 are cross-sectional views illustrating additional embodiments of the second hold-down means of FIGS. FIGS. 15, 16 and 17 illustrate deformations 70' in the form of an embossment 71', an indentation 74' and an embossment 77', respectively. 12 to 14, the deformations 70 may take the form of a usually rectangular embossment 77 having a decrease end 78 protruding from the top surface 72 of the sloped internet strip forty nine to offer a longitudinal concrete gripping surface 79. In every case, the longitudinal concrete gripping surfaces 73 or 76 or 79 complement the hold-down motion of the longitudinal keying recesses sixty four (FIG. 4) offered by the longitudinal rib 61, as will be hereinafter more absolutely described. FIG. 42 is an exploded isometric view illustrating an alternative embodiment of a hanger machine. In the popular embodiment the primary hold-down means 54 (FIG. 4) comprises a longitudinal rib 61 integrally formed at the juncture of and extending into the area between a contiguous sloped internet strip forty nine and the adjoining valley strip 48 (48a, 48b). The deformations 60 cut back the structural effectiveness of the valley strips forty eight (48a) under tension and compression. As shown in FIG. 2, the second hold-down means 55 includes a row of deformations 70 integrally formed in each of the sloped web strips 49. The deformations 70 may take the type of typically rectangular embossments 71 (FIGS.

The stiffened edge fifty nine includes an offset strip 83 spaced-aside from the widespread plane fifty two by a minimum of two sheet metal thicknesses. The stiffened edge 58' of the decking unit 44D comprises a primary offset strip 91 spaced-aside from the widespread plane fifty two by not less than two sheet steel thicknesses. The deformations 71', 74', 77', could also be formed by a punch-out process wherein the deformations 71', 74', 77' preferably are offset from the surfaces 72, 75, seventy two respectively, by less than two sheet metallic thicknesses. The present decking unit is formed from sheet steel having a girth of roughly 60 inches and could also be offered in sheet steel thicknesses within the vary of sixteen gauge to 22 gauge. Often, exterior house lights will do the job, particularly if the deck lies near the constructing; but for aesthetics and maximum enjoyment, lighting specifically designed for the deck is a detail worth having.

In addition, extremely slim slits 39 are produced having a width which is lower than one sheet metal thickness. FIGS. 34 and 35 are broken finish views of a fragment of the bundle of FIG. 33 wherein three of the decking models of FIGS. The decking unit forty four (FIG. 2) presents decking unit troughs 103 defined by the confronting sloped web strips forty nine and the frequent valley strip. The sheet metal decking unit forty four includes first hold-down means 54 positioned under the geometric mid-aircraft 50 for resisting vertical disengagement of the concrete forty five (FIG. 1) from the decking unit 44. Second hold-down means 55 positioned above the geometric mid-airplane 50 and supplementing the primary hold-down means 54, is provided for resisting vertical disengagement of the concrete 45 (FIG. 1) from the decking unit 44. Shear-resisting means 56 positioned below the geometric mid-aircraft 50 is supplied for resisting motion of the concrete 45 (FIG. 1) longitudinally of the decking unit 44. A longitudinal stiffening bead 57 preferably is provided in each of the crest strips 47. The lateral valley strips 48a, 48b are provided with stiffened edges 58, 59 respectively.

7, 10 and 13 that the deformations 71, 74, 77 are imperforate and for that reason are the preferred form of deformation for use in Cellular Metal Deck metal decking models -- see FIG. 36 -- of the type providing electrical raceways. As part of that evaluation, panel profiles are examined to ensure that they meet all specs. It is going to be observed in FIG. 21 that a joint 89 is provided between the adjacent decking units 44A, 44B, which is adjustable laterally through a distance indicated at 90. The joint 89 consists of three sheet metal thicknesses, that is, part of the offset strip 83, a part of the reverse-turned strip 87, and a part of the valley phase 81. The structural effectiveness of each of the lateral valley strips 48a, 48b underneath positive and damaging loading, is increased by the stiffened edges 58, 59, respectively. An analogous guiding function is offered by the opposed sloped internet strips forty nine in the embodiment illustrated in FIG. 4. Nestability of the current decking unit forty four will likely be absolutely described later within the specification. In a single embodiment of the current decking unit, every of the longitudinal ribs join the confronting edges of spaced valley segments. A stiffener strip eighty four connects the offset strip 83 to the adjoining valley segment 82. The offset strip 83 terminates in an upstanding first stiffener flange 85. The offset strip 83, the stiffener strip 84, the primary stiffener flange 85 and the rib sixty one cooperate to increase the structural effectiveness of the lateral valley strip 48b below optimistic and damaging loading.