AISI beam column design with lateral torsional buckling

NYC 9/11 Public Portal Document

- ■ HAYYEY CONNELL AE'HrEC^ NEC 05-; F. J2/:2 MAY. 2Y IFM

CD80AF3 and CDflOAF4 PERFORMANCE DATA

PRESSURE LIMITATIONS

CD90AF3 60' PrM4urfl llmltationb shown on charts at left allow maximum blade deflao- tlnn of 1/180 of span on 60“ damper

8- p«- widths. Dallectlons In other damper widths (lass than 46') at higher pres- suras shown will rasult In blade de (lection substantially less than 1/180 of span.

12- u . -1-1 J I I I L. I I rx „l I I I I 12 13 14 16 18 17 16 19 20 21 22 23 24 25 Pressure DIKerentlef* (Inches Water Qagat

The CD80AF3 may be used in systems with total pressure exceeding 13" w.g. by reducing Ihe damper section width as Indicaled In the chart. A maximum design total pressure of 17" w g. would raguire a CDfiOAFS damper with maximum section width of 36'.

CDB0AF4 60“

If Eg^®" 'NOTEiDamper should ba spedllad for fan eixit oft pressure. Pressure difleren* Hal Is not system pressure, but la the maximum pressure the damper will eneounler with Mades closed I***- 12" I I I I I 18 20 22 24 2b 28 30 32 34 36 38 40 42 44 Pressure CMHerenUai* (Inches Water Gage)

The CD80AF3 may be ussd in sysiems with total pressure exoesding 20" w g by reducing the dangler section width as indicated in ths chait. A maximum design total pressure of 86* w.g., for example, would require a CD6OAF3 damper with maximum section width of 48".

The COeOAF dampers may tcierata higher pressure Hm'taUons than those shown here. Cofisarviilve ratings ate presentad tntentlonalty In an ettort to avoid mlsapplicBiiuii. Consult RusMn ar your Ruskin representaiive when a damper Is lo be applied In ocndiiicns exceeding recommended maximums.

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