Document 6RGLB4JL06d9kQj3vnwMvykw9

atsMfegHAlNTlFHF'SS 1W KU }m ' ufr RGr-xmmi.f.%MS' Toyo?yi International Conference of Building Officials RESERRCH COItlllllTTEE RECORimERORTIOn Report No. 1578 September, 1973 'WWHCULnr TYPE MK-4 AND MK-5 (MONOKOTE) FIREPROOFING ZONOUTE DIVISION \V. R. GRACE AND COMPANY 2500 SOUTH CARNSEY STREET SANTA ANA. CALIFORNIA 92707 VERMICULITE PRODUCTS HOUSTON. TEXAS TEXAS VERM1CULXTE DALLAS. TEXAS ROBINSON INSULATION GREAT FALLS. MONTANA VER.MICUL1TE-INTERMOUNTAIN salt LAKE CITY. UTAH ARI.ZONOUTE PHOENIX. ARIZONA I. Subject: Vermiculite MK-4 and MK-5 (Monokote) Fire* proofing. II. Description: General: MK-4 and MK-5 direct-to-steel fileproofing materials are mill-mixed cementitious materials which are machine applied to fire protect steel structural framing members and steel door sections. The materials differ in their exact compo sitions which are of a proprietary nature. Both formulations are free of asbestos fibers. Application: The material is supplied in bags and is mixed with approx i mately six gallons of water per 25 pounds of material. It has setting characteristics and must be applied promptly after mixing. Clean equipment must be used. It is mixed in a plaster mixer and then machine-applied through a nozzle with air pressure and volume adjusted to provide the proper spray pattern. The material is applied in one coat, doubling back when the thickness is to exceed 1 inch. The wet density of the material as applied through the nozzle ranges from 48 to 60 pounds per cubic foot. The in-place density required is approxi mately 1.4 pounds per square foot per inch of thickness and may be verified by removing one square foot of material and determin ing the density after oven drying to constant weight. Steel surfaces which are to be protected must be clean and dry and free from dust, oil, grease or any other substances which would prevent good adhesion. Steel beams and columns may be painted or unpainted. Identification: The material is furnished in bap bearing an Underwriters' Laboratories, Inc. classification marking. III. Evidence Submitted: The results of fire endurance tests are submitted. Recommendation IV. Recommendation: That the Vermiculite Type MK-4 and MK-5 Fireproofing as manufactured by the listed companies is a satisfactory alternate method of firs protection of steel htsm. col umn and floor construction to that specified in the Uniform Build ing Code provided: 1. The material is applied as sat forth in Part II of this repost. 2. The material is classified as a Class I interior flMA. 3. Type MK-4 and MK-5 (Monokote) Fireproofing is net al lowed as a ceiling or wall finish or siposad boom treatment t a ceiling height of lass than 8 feet. 4. The thicknesses are net lass than the vaine set forth in Table No. I. 5. Fire-resistive ratinp assigned to structural steel columns are contingent upon protection of the MK-4 and MK-5 Fire proofing from the Boor to a height of at bast 8 feet by an approved surfacing material to avoid injury to the Rtpm*ing on any lace that may be subjected to direct contact 6. Where trench headers or header ducts are used the method for establishing header duct ioccticn from the undenido shall be approved by the Building OfishL This recommendation is subject to asmual n siamlnatkm 'of 2 TABLE NO. I--MINIMUM TYPE MM AND MK-S (I (W WOO OP nKPflOOFIM TYM COMTtUCtlM ML S-ML ML 1 -uii.il (Jeep Li-llular Steel floor or panels tilutcd top ami bottom 1 with 24 inches of concrete on nil '1 \rv \|)C i Monokote' Firemg applied directly to the solfit of tcel panels to fill all troughs to i shown i measured from bottom nets) 4 o-inch deep cellular steel floor or panels (Huted top and bottom ) vuth 2l,s inches of concrete on in<l Tvoe- MK i Monokote) Fire* fine applied directly to the soffit of tcel panels following the contour 4 (Bs) 4 (T) 4 e-inch deep cellular steel floor or panels i liuted top plate and flat jm plate > used in conjunction with luted i smcle plate) floor or roof . with 24 inches of concrete on and Typ,. MK i Monokote) Fire* >finc applied directiv to the soffit he panels following the contour1 * (Bs) 4 (T) 4 ce-n.ch deep all cellular steel floor oof pam h i tinted top plate and flat turn plate' with 24 inches of con ic on top and Type MK 1 Mono- ; . ) Fireproofing applied directly to steel panels- 44 roe-inch deep all fluted steel floor or i panels i smcle plate) with 24 lies of concrete on top and Type MK Innoknte) Fireproofing applied ditly to the steel panels following the ntour 4 (Bs) 1 (T) 4 and one-half-inch deep fluted steel r or roof panels with web indenta- > i smcle sheet) and 24-inch rein ed concrete slab on top (designed ict as a composite section with the <) and Type MK (Monokote) proofing applied directly to die sof- the steel panels to fill aH troughs lepth shown l measured from bottom panels) 4 Report No. 1S7S TABU NO. I--<Cm6rimAI nn or constiuctiom *-*. ml i-aa. Reinforced concrete joist construction with a 2 4-inch thick concrete slab and Type MK (Monokote) Fireproofing applied directiv to the soffit of slab only. Joist steel shall have 1-inch clear con crete cover 4 One and onc-half-inch deep all Ruled i smcle pl.ite) or cellular steel floor or roof panels (fluted top plate and flat bottom plate) with web indenta- tions (designed to act as a composite section with the concrete) with 24 inches of concrete on top and Type. MK (Monokote) Fireproofing applied directly to the soffit of the steel panels following soffit contour 4 (B) 1 (Ts) 4 One and one-half-inch deep all fluted i single plate) or cellular steel floor or roof panels (fluted top plate and flat bottom plate) with 2 4 inches of con crete on top and Type MK (Mono, kote) Fireproofing applied directly to the soffit of the steel panels following soffit contour 44 Steel beam with Type MK (Mono* kote) Fireproofing applied directly to 2 14 1 web and flanges Structural steel columns with Type MK (Monokote) Fireproofing applied di 24 14 rectly to the web and flanges 14 Structural steel columns having a sec tion equal to or greater than a WHx228 column with Type MK (Monokote) 14 Fireproofing applied directly to the web and flanges 4 4 4 4 '(A) Unhi othenrite indicated* the tpvciflad HdcknHHi of Tv*a MK Fireproofinc arc averse* value* inch. Tha mount of ndMO over ** inch shall not bo included when datewwioing tho average (B) indicates the required thickness of Typo MK FbopnoAhg m do bottom of fluted sections, or on tho flat plate of --rtfmm having Bat lower plate. (T) w the required thickness across the top of the doted sections. Subscript <t> foUowim symbols B oe T (le or Tl> tedteetei the same thickness at required for the bottom <B) of Top (T) to required for the sides of the fluted sections. 'Approved trench headers hevtnc a maximum width of 36 inches mop bo used provided they are protected with u-inch additional thirho--m of Ty pe MK with flutes of the fluted units tilted. The increased thteknemoi shall extend 5 inches beyond each side of the header.