Document jB5e5bmyqEKpVpZe67VrzdQqO

I WRG^eii VVRG ULlU^ Tfyoryj International Conference of Building Officials RESERRCH COIMMTTEE RECOmitlEnORTIM Report No. 1578 September, 1972 VERMICULITE TYPE MK-1 AND MK-4 (MONO-KOTE) FIREPROOFING ZONOLITE DIVISION IV. R. CRACE AND COMPANY 2500 S. OARNSEY SANTA ANA. CALIFORNIA 926SO XERMICl/LITE PRODUCTS HOUSTON. TEXAS TEXAS VERMICL'LITE DALLAS. TEXAS ROBINSON INSULATION GREAT FALLS MONTANA VERMICULITE-INTERMOUNTAIN SALT LAKE CITY, UTAH ARI-ZONOLITE PHOENIX. ARIZONA t. Introduction: At the request of the Zonolite Division, W. R. Crate and Cn., Sjnta Ana, California, the Research Committee nf the International Conference of Building Officials has made a re-examination of the data submitted in connection with the use nf Vermiculite MK-Y and MK-4 l.Monn-Knte) Fireproofing. II. Description: Cenerai: Vermiculite MK-Y I Mono-Kote) Fire proofing is a mill-mixed cementitious material of grayish brown color and granular texture which is machine-applied to fire-protect steel beam and floor construction. The exact composition of the material is of a proprietary nature. Vermiculite .MK-4 (Mono-Kote) Fireproofing is completely free of asbestos fibers. It is machineapplied to fire-protected steel beam and Hoor construction. The exact composition is also of a proprietary nature. Application: The material is supplied in bags and is mixed with approximately 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 mixer for a minimum of three to four minutes and then machine-applied through a nozzle with air pressure and volume adjusted to provide a spray pattern. The material is applied in one coat, doubling back when tne thickness is to exceed one inch i l"). The wet density of the material as applied through the nozr.lr ranges from 52 to 65 pounds per cubic foot. The in-place den sity required is approximately 1.5 pounds per square foot per inch of thickness and may be verified by removing one square foot of the material and determining the density after oven drying to con stant weight. Steel surfaces svhich are to be protected must be dean and dry and free from dust, oil. grease, galvanized particles or any other substances which would prevent good adhesion. Steel beams and columns may he painted or unpainted. III. Evidence Submitted: The results of fire endurance tests are submitted. Recommendation IV. Recommendation: That the VermkulRe Type MK-3 and MK-4 Fireproofing as manufactured by member companies of the Vermiculite Institute is a satisfactory alternate method of fire protection of steel beam, column and floor construction to that specified in the Uniform Building Code provided] 1. The material is applied as set forth in Part n of this report. 2. The material is classified as a Class I interior finish. Y. Type MK-Y and MK-4 (Mono-Kote) Fireproofing b not allowed as a ceiling or well finish or exposed beam treatment at a ceiling height of less than eight feet (8*). 4. The thicknesses are not lets than the vaioe set forth in Table No. I. 5. Fire-resistive ratings assigned to structural steel columns are contingent upon protection of the MX-3 and MK-4 Fire roofing from the floor to a height of at least eight feet (8') y an approved surfacing material to avoid injury to the fireproofing on any face that may be subjected to direct contact. 6. Where trench headers or header ducts an umd the method for establishing header duct location from the underside shall be approved by the Building Official. Thu recommendation is subject to annual re-examination. ir 2505061* Pact 1 of 2 Pago TABLE NO. I--MINIMUM THICINESS (M INCHES) Of TYPE MR-) AND MM (MONO-ROTE) FtREPMOPINC TYP1 tf eiMTWCTMN 44B. frML ML 1-ML Three-mch deep cellular steel Boor or roof panell (fluted top and bottom plate' with 2l4 inches of concrete on top and Type MK (Mono-Kote) Fire proofing applied directly to the soffit of the steel panels to fill all troughs to depth shown (measured from bottom of panels) '4 Three-inch deep cellular steel floor or roof panels (fluted top and bottom plate) with 2)4 inches of concrete on tnp and Type MK (Mono-Kote) Fire proofing applied directly to the soffit of the steel panels following the contour S I Bs) *4 (T) H Three-inch deep cellular steel floor or roof panels (fluted top plate and flat lxittom plate) used in conjunction with all fluted (single plate) floor or roof desk with 2'i inches of concrete on top and Type MK (Mono-Kote) Fire proofing applied directly to the soffit of the panels following the contour2 / (Bs) % (T) H Three-inch deep all cellular steel floor or roof panels ( fluted top plate and flat bottom plate) with 214 inches of con crete on top and Type MK (MonoKote) Fireproofing applied directly to the steel panels2 14 14 Three-inch deep all fluted steel floor or roof panels (single plate) with 21s % | inches of concrete on top and Type MK (Mono-Kote) Fireproofing applied di- (Bs) 14 1 reedy to the steel panels following the (T) contour One and one-half-inch deep fluted steel Hoor or roof panels with web indenta tions (single sheet) and 214-inch rein forced concrete slab on top (designed to act as a composite section with the deck) and Type MK (Mono-Kote) Firnpoofing applied directly to the sof fit of the steel panels to fill all troughs to depth shown t measured from bottom of panels) 14 *'w*07*j t Raport No. 157* TUU NO. I--<Cm*n> rm or comstwctiom **a. WM. T Reinforced concrete toast construction with a 214-inch thick concrete slab and Type MK (Mono-Kote) Fireproofing f| applied directly to the soffit of slab unly. Joist steel shall have 1-inch clear con crete cover ! 1-ML 1-ML [ T* One and one-half-inch deep all fluted ; single platr) 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 2)4 inches of concrete on top and Tvpe MK ( Mono-Kote) Fireproofing applied directly to the soffit of the steel panels following soffit contour \ (B) 1 (Ts) One and one-half-inch deep all fluted (single plate) or cellular steel floor or roof panels (fluted top plate and flat bottom plate) with 214 inches of con crete on top and Type MK (MonoKote) Fireproofing applied direedy to the soffit of the steel panel* following soffit contour %H Concrete masonry block and beam floor and roof system with Type MK (MonoKote) Fireproofing applied directly to the bottom flange of the steel beams % *4 Steel beam with Type MK (Mono* Kote) Fireproofing applied directly to 2 1*4 t web and flanges H Structural steel columns with Type MK (Mono-Kote) Fireproofing applied di 214 1% 114 rectly to the web and flanges % Structural steel columns having a sec tion equal or neater than a 14WF 228 column with Type MK (Mono-Kota) Fireproofing applied direedy to the web and flange* 114 % < A) Uaims mbirwnt inditsred, tka ipinAad .................. of Tw MX FiraprooAas ora innn vabm * W lack. TW imi of aictwi over H inch shall not bo inchidse wkan rtHanwloioo tw ovonao. (B) indicsm tW required tUckaus of Typo MX Tiisproofil aa tw bottom of lured mtiesu. or oa tW lat Plata of MthCM havtar a (at lowor plata. (T) la tha required tkkkaoaa scn tka top of tka lured sacnoaa. Subscript If) toUowins symbol! B of T IBa or Tf> indium tW sama rtiirbniore aa required ter tka botMa IB) or Top IT) it IMUUOd for A| Ilia laifaal uNm. Approved trad baadan havtaa a mummum width of 36 inchat may W uaad ptovidnd they an protactad with Wdach uliliimaal tail toaaaai of Typo MX with Butaa of tka iutod uaita Iliad. Tka lacraaaad thlcbnatari shall otaad 3 iachaa beyond aack aada of tW baadar. d' o d' O d' ii