Fire-Trol Design Considerations Fire-Trol columns are designed in accordance with the latest specifications of the American Institute of Steel Construction and the American Concrete Institute. Minimum covering of fireproofing is in accordance with the minimum hourly rating requirements established by Underwriters Laboratories, Inc. All structural steel used in the core conforms to ASTM Specifications. Concrete filing for pipes or tubular sections is of 5000 p.s.i. mix. The outer shell, sash stops, curtain wall connections and other special features are provided in accordance with the architect's details. Welded shop and field connections are in strict conformance with the current requirements of AISC. Columns are given one shop coat of standard metal primer unless otherwise specified. Fire-Trol columns are readily adaptable to single or multi-story structures of conventional, traditional, or contemporary design...and with any combination of materials. A complete selection of load-bearing column types is available with exterior shells in round, square, and rectangular shapes. The round exterior shells are Type OO and OH. The square and rectangular exterior shells are Types SH, RH, SO, SS, and RR. Fire-Trol columns meet the requirements of local, state, national, and federal codes governing fire-resistive construction. Each Fire-Trol column is fabricated in conformance with the requirements of Underwriters Laboratories, Inc., and bears a UL label certifying compliance with requirements as stated in their directory. Specifications Scope Design Materials Wide Flange: A-36, A572 GRADE B In instances where the core is a pipe or tube, Fire-Trol columns are always filled with high strength concrete that shall attain an ultimate compressive strength of 5000 p.s.i. in 28 days, machine mixed and mechanically vibrated to eliminate voids and insure density. Shop Drawings Fire Rating Connections Painting Handling and Erection 
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