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Building Design and Construction Handbook - Merritt - Ventech!

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8.54 SECTION EIGHT<br />

TABLE 8.15 Physical Properties of Metric Sheeting*<br />

Thickness<br />

Gage in<br />

lb/lin ft<br />

of pile<br />

Weight<br />

lb/ft 2<br />

of<br />

wall<br />

Section modulus,<br />

in3 Per section Per ft<br />

Section properties<br />

Moment of inertia,<br />

in4 Per section Per ft<br />

5 0.2092 19.1 11.6 5.50 3.36 9.40 5.73<br />

7 0.1793 16.4 10.0 4.71 2.87 7.80 4.76<br />

8 0.1644 15.2 9.3 4.35 2.65 7.36 4.49<br />

10 0.1345 12.5 7.6 3.60 2.20 6.01 3.67<br />

12 0.1046 9.9 6.0 2.80 1.71 4.68 2.85<br />

* Based on ‘‘CONTECH Metric Sheeting,’’ 1990, CONTECH <strong>Construction</strong> Products Inc., Middletown,<br />

Ohio.<br />

Metric sheeting should not be confused with steel sheetpiling, which is a heavier<br />

hot-rolled steel product used for major construction projects, including breakwaters,<br />

bulkheads, cofferdams, <strong>and</strong> docks. Metric sheeting is nevertheless an economical<br />

product suitable for many less-dem<strong>and</strong>ing applications for both temporary <strong>and</strong> permanent<br />

uses. An advantage for contractors is that it can be withdrawn <strong>and</strong> reused<br />

on another job.<br />

More information on lightweight steel construction is available from CONTECH<br />

<strong>Construction</strong> Products, 1001 Grove Street, Middletown, OH 45044<br />

8.25 STAINLESS STEEL STRUCTURAL DESIGN<br />

Cold-formed, stainless-steel structural members require different design approaches<br />

from those presented in Arts. 8.1 through 8.13 for cold-formed structural members<br />

of carbon <strong>and</strong> low-alloy steels. An exception is the stainless steels of the ferritic<br />

type that are largely alloyed with chromium <strong>and</strong> exhibit a sharp-yielding stressstrain<br />

curve. The austenitic types of stainless steel, incorporating substantial<br />

amounts of nickel as well as chromium, have stress-strain curves that are rounded,<br />

do not show sharp yield points, <strong>and</strong> exhibit proportional limits that are quite low.<br />

Because of excellent corrosion resistance, stainless steels are suitable for exterior<br />

wall panels <strong>and</strong> exterior members of buildings as well as for other applications<br />

subject to corrosive environments.<br />

The ‘‘Specification for the <strong>Design</strong> of Cold-Formed Stainless Steel Structural<br />

Members,’’ ANSI-ASCE 8-90, American Society of Civil Engineers, 1801 Alex<strong>and</strong>er<br />

Bell Drive, Reston, VA 20191-4400, presents treatments paralleling those of<br />

Arts. 8.1 through 8.13, except the primary emphasis is on the load resistance factor<br />

design (LRFD) method. The allowable strength design (ASD) method, however, is<br />

also mentioned. For detailed information on austenitic grades of stainless steel, see<br />

ASTM A666, ‘‘Austenitic Stainless Steel, Sheet, Strip, Plate <strong>and</strong> Flat Bar for Structural<br />

Applications.’’<br />

(W. W. Yu, ‘‘Cold-Formed Steel <strong>Design</strong>,’’ 3rd ed., John Wiley <strong>and</strong> Sons, Inc.,<br />

New York.)

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