[ ] ] [ 6a2O s6 Height B PW CABLE TRAY PW CABLE TRAY

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1 PW CBE RY PW CBE RY Covers protect and contain cables. hey are highly recommended ray Covers to avoid damage to the tray contents and to protect against the elements. Some covers can also be attached to the tray with Flat Cover Connectors M * Peaked Cover Connectors M * hinges; please contact egrand for more information. SOID COVERS flat, non-flanged flange in 1 3 /4" flange out Series 2 [ ] ] [ solid, flat non-flanged Product Number M For use with indoor, outdoor, or vertical flat covers. op and bottom pieces are 1½" wide. Install one connector over each cover joint and space additional connectors on 36"- 48" centers. channel-style For use with indoor, outdoor, or vertical peaked covers. op and bottom pieces are 1½" wide. Install one connector over each cover joint and space additional connectors on 36"- 48" centers. Standard angle of peaked cover is 15, but custom angles are possible. Please contact egrand for more information. channel-style PPICION PPICION flat, flanged solid, flat flanged* Product Number M strap-style strap-style peaked 15, flanged solid, peaked 15 flanged Product Number M PPICION PPICION OUVERED COVERS louvered, Flat non-flanged Product Number M flat, non-flanged louvered, Flat flanged* Product Number M Channel 1400 ZN strap 1423 Channel 1411 ZN strap 1440 Widths (W) inches metallic covers 42 flat, flanged Side Rail Height* 40 4" 50 5" 60 6" 70 7" Cover System No. * side rail height necessary for outside vertical fitting covers. ** standard lengh for steel covers hot-dip galvanized after fabrication per SM-123 is 6'-0". * Flange is 3/8" wide. 15 is standard angle for peaked covers. Flange is 3/8" wide. cover Catalog ing example: ength or Fitting Product No B ength 0006** 6' ' ' or 9224 Fitting Product No. Width Fitting angent 05 - SERIES 2 (5" angents ) Cover hickness etter suffixes are used to indicate alternate cover thicknesses. eave blank for standard thickness. Standards: 18 a. M 20 a. 18 age (0.048") B 16 age (0.060") C 14 age (0.075") SPICES Match above to determine the connectors you need. Fitting side rails have 2" tangents (flat portion beyond curvature) at the end of each fitting, to accommodate splice plates with four holes. Fitting side rails have 5" tangents at the end of each fitting, to accommodate splice plates with eight holes. cover connector Catalog ing example: Fitting System No. Product No. 6a2O s6 Side Rail Height * *optional Fitting Series Flange Direction Width ZN metallic cover connectors

2 PW CBE RY PW CBE RY Cover Connector Clips For use with indoor, horizontal covers. Flange-in clip requires tray with 1" side rail flanges. Flange-out clip works with any side rail flange width. Sold individually. H-Binder Strip Flange-in clip Flange-OU clip H-Binder Cover Joint Clip Closes gaps at cover joints. Notched for the tray side rail. No required. Cadmium-plated steel are standard for all splice plate connectors on aluminum and steel cable tray systems. ll splices are supplied in pairs. ype 316 stainless steel are standard on stainless steel systems, but are available as an option on all aluminum and steel systems. Sufficient connector pairs with are automatically included with each shipment of straight sections and fittings. Extras for field cuts or spares must be ordered separately. Bonding jumpers are required for all expansion splice plates, adjustable connectors, and tray discontinuities. he symbol indicates that bonding jumpers are required. Standard Splice Mid-Span Splice butting Covers H-Binder Strip butting Covers hese heavy-duty splice plates are designed for random location, including mid-span. Field-drilled holes are required in the bottom flanges of adjoining trays. Flange-in 1410 Flange-out 1853 catalog ing example (ea.): included flat cover clip 0925 peaked cover clip 0926 catalog ing example (ea.): Connector System No. Width 2o I, 1O and 2O are the only three Connector System No. possiblities for this part. 02 Connector System No Connector System No his item must be specified as Series 2 in the System No. Raised Cover Connector M * Raised Cover Connector M Universal Splice Reducing Height Splice For use with all covers, indoors and outdoors. Covers are attached to uprightmounted C channel on the top of the cable tray. Install 36"-48" on center. Flat or Peaked Cover with Flanges ap Raised cover connectors allow for ventilation of ladder tray installations while protecting cables from possible falling objects. Raised cover connectors allow a gap of 1, 2, 3 or 4. PPICION hese splice plates are designed to connect to existing cable tray. hese splice plates are designed to connect cable tray side rails with different heights. he connector system includes the larger side rail height. Choose the depending on the reduced side rail height. metallic cover accessories gap dimension (In.) ZN fitting System No. width 62o included 1432 catalog ing example (ea.): M Connector System No SPICES Match above to determine the connectors you need. Fitting side rails have 2" tangents (flat portion beyond curvature) at the end of each fitting, to accommodate splice plates with four holes. size 86 Reduces to 4" high tray 79 Reduces to 5" high tray 55 Reduces to 6" high tray Connector System No metallic splices & connectors 44 Fitting side rails have 5" tangents at the end of each fitting, to accommodate splice plates with eight holes

3 PW CBE RY Cadmium-plated steel are standard for all splice plate connectors on aluminum and steel cable tray systems. ll splices are supplied in pairs. ype 316 stainless steel are standard on stainless steel systems, but are available as an option on all aluminum and steel systems. Sufficient connector pairs with are automatically included with each shipment of straight sections and fittings. Extras for field cuts or spares must be ordered separately. Bonding jumpers are required for all expansion splice plates, adjustable connectors, and tray discontinuities. he symbol indicates that bonding jumpers are required. PW CBE RY ll splices are supplied in pairs. Bonding jumpers are required for use with all adjustable splices. Floor Flange / ray-to-box Connector Horizontal djustable Splice Expansion Splice Permits thermal contraction and expansion in a cable tray installation. he length of the straight cable tray run and the temperature differential govern the and spacing of expansion connectors. Expansion splice plates permit 2" of movement. Straight Reducer Splice RN 2 for tray attachment only are included. Floor connection leg has 9/16 diameter hole. For odd angle bends up to 30 W 14 Connector System No Connector System No. RN Connector System No Connector System No W Offset Reducer Splice 90º Connector Vertical djustable Splice Vertical Hanger Splice 7/16 DI HOES ray-to-box Frame Connector Maximum bend angle is PPICION Sold individually. 7/16 DI HOES W B RN RY WIDHS W Dimensions BH /4 B W + 4 metallic splices & connectors Connector System No. RN Widths (W) inches reduction (Rn) inches Connector System No SPICES Match above to determine the connectors you need. Fitting side rails have 2" tangents (flat portion beyond curvature) at the end of each fitting, to accommodate splice plates with four holes. Fitting side rails have 5" tangents at the end of each fitting, to accommodate splice plates with eight holes. 07 Connector System No Connector System No Connector System No. Width ll connectors on these pages are designed to fit Series 1 and 2 systems. When ordering, however, they should be specified as Series 2. metallic splices & connectors

4 PW CBE RY PW CBE RY metallic splices & connectors aminated aluminum Bonding Jumpers Straight Horizontal Divider M * Vertical Fitting Divider RED MPS (N.E.C ) Use across all discontinuities, expansion joints, and adjustable For use with all straight tray. Furnished with four #10 Furnished with two #10 self-drilling screws " or 22" 2000 connectors to maintain electrical continuity in the cable tray self-drilling screws. catalog ing example (E:): system. lso use to bond the cable tray system to the building ength ground. Bonding jumpers are not required at standard or rigid splice locations. for bonding jumpers must be ordered separately insulated copper C laminated aluminum insulated copper aminated luminum: Use (4) 3 /8" x 1" bolts per Bonding Jumper. Insulated Copper: Made with flame-retardant, moisture- and heat-resistant, insulated copper cable. in plated copper lugs have one hole, sized for 3 /8" x 3 /4" bolt. ength is 15" to the center of the lug holes. Special lengths, lugs, and cables are also available. Splice 15" Knurled Bolt: Specially designed for cable tray connectors, the ribbed neck firmly grips the tray side rail to prevent screw rotation while tightening. Bolt can also be tightened with a Phillips screwdriver. Flanged Hex Nut: Free spinning lock-type nut with a serrated face, eliminating the need for a washer. Nuts require a 9 wrench. ighten to approximately ft-lbs of torque. ocking Hex Nut: For use with expansion connectors. Deformed threads cause this nut to lock on to the bolt after just a few turns, allowing movement of the bolt in the expansion slot without possibility of the nut backing off. ypically identified by a rectangular indentation on the side of the nut. Flat Washer: For use with expansion connectors. Install under the locking hex nut in the expansion slots. Prevents binding in the expansion slot during movement of the tray due to thermal expansion. Knurled Bolt Flanged Hex Nut ocking Hex Nut Flat Washer Copper Cable Size SIZE 3/8"-16 x 3/4" 3/8" Dia. 3/8" Dia. 3/8" Dia. RED MPS (N.E.C ) 806 # # # # /O /O /O /O * 4/O Welding Cable 2107 Strands 1800 catalog ing example (ea.): C * length is 30" to the center of the lug holes. One-hole tin-plated copper lugs are sized for 1 /2" bolt. Complete Catalog DS DS DS DS DS DS DS DS ZN ZN Flexible Horizontal Divider For use with all horizontal fittings of any radius. Furnished with three #10 self-drilling screws ' ZN M * R Divider type 90 Inside Elbow 90 Outside Elbow 60 Inside Elbow 60 Outside Elbow 45 Inside Elbow 45 Outside Elbow 30 Inside Elbow 30 Outside Elbow ZN 4a ZN M * 48 * = optional

5 PW CBE RY PW CBE RY Divider Hold Down Clip M * 5" Vinyl Divider Splice V Blind End Plate M * Cable Dropout M * Purchased separately. Supplied with carriage bolt and flanged hex nut. Designed for use with ladders with box-shaped rungs (ypes BX & BH see pages 66-67). Splices joints of abutting divider strips. Vinyl edge strip is also available in bulk lengths. Seals off the open end of a cable tray. ttaches to the tray using standard 3 /8" dia. connector. Provides a smooth, rounded surface for cables dropping out of the bottom of the cable tray ZN M ZN 5" 0930 V M ZN Number R / ZN -Flange Width I ray width (nominal) Dropout width (Flg In) 2 1 /4 5 1 /4 8 1 / / / / /4 in Dropout width (Flg Out) 5 1 /4 8 1 / / / / / /4 Divider Splice Self-drilling Screw Wall M Outdoor Conversion for Wall Penetration Sold in bags of 25. complete Cat. No. COJ- M COJ-P COJ-316 Provided with all dividers, but extras can be ordered separately. Complete catalog No. size DS ZN ZN #10 x 3 /4" DS #10 x 3 /4" Provides a rigid support for cable tray at wall penetrations. Overall length of the sleeve is 20". Will fit walls up to 8" thick. Bonding jumpers are not required for use with wall sleeves. wo pairs of splice plates and are included for tray attachment Connector System No Width Makes ladder tray wall penetrations weather resistant to minimize water intrusions. Removable cover/shield fastens to tray and wall penetration sleeve for the utmost in weather protection. Fits Standard Hot-Dip alvanized or Stainless "0424" or "0440" wall penetrations (see page 58.) Sized to fit flange-in or flange-out trays 0434 Connector System No Width he wall penetration sleeve and outdoor conversion kit are designed to fit Series 1 and 2 systems. When ordering, however, they should be specified as Series * = optional

6 PW CBE RY PW CBE RY Hold Down/Expansion Clamp Z Z-Hold Down/Expansion uide M * I-Beam Hold Down Clamp/ Expansion uide Z Single Overhead Hanger Clamp M Works as an expansion guide and flips over for use as a hold down clamp for use with all ladder trays. Sold individually * ZN None ZN a ZN * Includes 3 /8" x 1½" hex bolt, 3 /8" flanged nut. Includes 3 /8" x 1½" hex bolt, 3 /8" spring nut. Wraps around the tray side rail for use with all solid bottom trays. Can also be used with any flange-in tray system. Expansion guide is slightly taller to permit longitudinal tray movement caused by thermal expansion. Sold individually. Z-HOD DOWN EXPNSION * ZN None ZN 4M ZN * Includes ¼" x ¾" carriage bolt, ¼" flanged nut. Includes ¼" x 1½" screw, ¼" spring nut. Hold Down Clamp firmly attaches the cable tray to the flange of an I-beam type support. Expansion uide attaches the clamp to the flange of an I-beam type support, allowing movement of the tray side rail due to thermal contraction and expansion. HOD DOWN EXPNSION * Z *Includes (2) ½" x 5 /8" screws and (1) ½" x 1 ½"screw. Includes (1) ½" x 1½"screw. No drilling is required for either installation. ttaches to the tray bottom flange and supports the cable tray directly from a threaded rod without the need for an additional support member. hreaded rod purchased separately. ROD DI /2" / 8 " included ZN M Heavy-Duty Hold Down Brackets Wire Mesh-to-adder Clamp Z Hanger Brackets M * Nylon Isolation Pad N Designed for use with all trays. 3 /8" diameter hardware for tray attachment only is included. Holes for structure attachment are sized for 1 /2" diameter. Ideal for vertical tray support. Sold in pairs. his unique clamp allows wire mesh cable tray to be attached to the side rails of any ladder tray and a pre-installed setscrew secures the junction for a permanent installation. SINE: Supports a single tray side rail from a ½" threaded rod. For use with all flange-out ladder tray systems. Safe load = 300 lbs. per bracket. Made of extruded black nylon. Can be installed between the cable tray and support member to provide electrical isolation of the tray system. Can also be used to facilitate cable tray movement caused by thermal contraction and expansion. No required WMC 2 - WMC 2 - DOUBE: Supports two tray side rails that are installed side-by-side from a single ½" threaded rod. For use with all flange-out ladder tray systems. Safe load = 300 lbs. per bracket. DIMENSIONS / 8 " x 3" x 6" N Widths (W) inches SPICES Match above to determine the connectors you need. Fitting side rails have 2" tangents (flat portion beyond curvature) at the end of each fitting, to accommodate splice plates with four holes. Fitting side rails have 5" tangents at the end of each fitting, to accommodate splice plates with eight holes. * = optional SINE 836 NONE DOUBE 837* ZN 4M ZN *Includes ¼" x 5" hex head bolt and ¼" flanged nut

7 PW CBE RY PW CBE RY Made from 12-gage strut. Hangers have 9 diameter holes from each end to accept 1 /2" threaded rod. Kit includes. When used with Z-type hold-down clamps, select hanger with flange out dimensions. single hanger channel kit* 3 1 /4" Single Hanger Channel Double Hanger Channel DI. M M Made from 12-gage struts welded back-to-back. Hangers have 9 dia. holes from each end to accept 1 /2" threaded rod. When used with Z-type hold-down clamps, select hanger with flange out dimensions. DOUBE hanger channel kit* RY FNE IN FNE OU WIDH hanger kit (W+4) (W+10) included with kit only* ZN ength M * RY FNE IN FNE OU WIDH hanger kit (W+4) (W+10) included with kit only* ZN Wall Bracket Recommended for use with flange-in cable trays. 3 / 8" x 1" SOS ON 2" CENERS 7 /8" 2 3 /4" 9 DI. 2" Double Strut Bracket H 1 1 /2" 0353 Made with x x 12 gage steel struts. H ½ 25 7½ ength 3 /8" x 1" SOS ON 2" CENERS design load - uniform (BS.) 900 Made with x x 12 gage steel struts. 1 1 /2" Single Strut Bracket 9 /16 DI. 3 1 /8" 2" 4 3 /4" Heavy-Duty Strut Bracket 0215 Made with x x 12 gage steel struts. design load - uniform (lbs.) ength Center Hanger Channel 9 DI. Mounts with one 1 /2" threaded rod to allow cable installation from both sides. Cable should be loaded evenly on both sides of the center support to remain level. 12-gage strut accepts channel nuts for hold down clamps with no drilling required. Not recommended for trays over 24" wide. When used with Z-type hold-down clamps, select hanger with flange out dimensions. M CENER hanger channel kit* ength M * RY FNE IN FNE OU WIDH hanger kit (W+4) (W+10) included with kit only* ZN ength M * 4 3 /8" 9 DI. 3 1 /4" 2" 6" 0216 design load - uniform (lbs.) ength t /4" SIFFENER BR ON 31" ON ND REER H 3 1 /8" 2" 9 DI ength SIFFENER BR ON 31" ON ND REER H design load - uniform (BS.) *Kits include hardware for ladder trays. Contact egrand for other design

8 PW CBE RY PW CBE RY Cable Clamp round Wire ttachment Clamp Z Clamp Bracket M Installation 56 For use with all ladder cable trays with box-shaped rungs. Cable ray rounding Clamp cable size /4" /8" RY " SIDE RI /8" /4" /8" /2" /4" /8" " /8" /4" /8" /2" /8" /4" /8" " /8" /4" /8" /2" /8" /4" /8" " INCUDED Provides an excellent ground for copper or aluminum ground wires to the cable tray. 1 /4 hex wrench is used to tighten both tray and conductor set screws. Clamps are tin-plated, extruded aluminum. Conductor Range: #6W to 250 MCM. included ZN ZN Holds one or two bare copper or aluminum ground wires against the cable tray side rail using included 3 /8 diameter. his clamp does not bond the ground wire to the tray. 1 1 / 4 RY SIDE RI 1 1 / 4 Conduit Bracket Clamp ttaches conduit to the cable tray side rail. PPICION Conduit Plate Clamp ttaches conduit to the ladder tray rungs. RUN SPCIN inches 9" PE " PE * Can also be used with medium-wall (IMC) and thick-wall (rigid) conduit. prod. NO. conductor size #2, #1 and 1/ #6 to # /0, 3/0 and 4/0 Z prod. NO. conduit dia. EM dia /8"-½" ½" ¾" ¾" " 1" ¼" 1¼" ½" 1½" " 2" ½" 2½" " 3" " 4" ZN S S4 EM dia /2" /4" " /4" /2" " * 2 1 /2" * 3" * 4" INCUDED Rung Spacing 09 - M Z M Permits attachment of clamps or other components to the cable tray side rail. Conduit clamps are purchased separately. 1 1 / / / 2 Maple Cable Blocks 1818 ZN Paraffin impregnated and furnished with 1 /4" dia.. Contact egrand with quantities, cable dimensions, cable spacing, and cable tray system information. Can be custom designed for a wide variety of applications. Slip-on ock Nut included 0950 s specified llows the user to slip the nut onto a rod, without actually threading it. Ideal for when nuts must be added to a rod, but cannot be threaded due to previously-installed equipment. Plastic Safety Sign ZN number size SON 1/4 1/4"-20 SON 3/8 3/8"-16 SON 1/2 1/2"- SON 3/8-ZN Sign measures 8"x12". Complete Catalog P S4 threaded ROD rod coupling nut channel nut W/ spring channel nut w/o spring hex nut flanged hex nut square channel washer flat, round washer hex head bolt slotted, round-head screw beam clamp SIZE Safe oad: *750 lbs.; 1100 lbs.; 1600 lbs. Complete catalog ZN ¼"-20 x 6' DS ZN DS /8"-16 x 12' DS ZN DS ½"- x 12' DS ZN DS ¼"-20 DS ZN DS /8"-16 DS ZN DS ½"- DS ZN DS ¼"-20 DS ZN DS /8"-16 DS ZN DS ½"- DS ZN DS ¼"-20 DS ZN DS /8"-16 DS ZN DS ½"- DS ZN DS ¼"-20 DS ZN DS /8"-16 DS ZN DS ½"- DS ZN DS ¼"-20 DS ZN DS /8"-16 DS ZN DS ½"- DS ZN DS ½"w/ ¼"hole DS ZN DS ½"w/ 3 /8"hole DS ZN DS ½"w/ ½"hole DS ZN DS ¼" DS ZN DS /8" DS ZN DS ½" DS ZN DS ¼"-20 x ¾" DS ZN DS /8"-16 x 1½" DS ZN DS ½"- x 1½' DS ZN DS ¼"-20 x 3/4" DS ZN DS /8"-16 x 3/4" DS ZN DS ½"- x 1½'" DS ZN DS for ¼" rod DS ZN* DS * for 3 /8" rod DS ZN DS for ½" rod DS ZN DS metallic

9 PW CBE RY PW CBE RY W*=Nominal ray Width H*=ray Side Rail Height Fire Wall Fixed collar is welded to sleeve 20" W*+6" side view end view W*=Nominal ray Width H*=ray Side Rail Height Wall ssembly (ypsum Wall Shown) djustablecollar Fixed collar is welded to sleeve Cable trays are attached to both ends of the sleeve using standard splice plate connectors djustable Collar Wall nchors H*+6" 7 diameter holes for 3/8" hardware (not included) Outdoor Conversion for Wall Penetration (0434) See page " M W*+6" 0440 oose collar slides over sleeve after it is placed in the wall W*=Nominal ray Width H*=ray Side Rail Height Fabricated cable tray fire stop sleeves from egrand, combined oose collar slides with Hilti over Firestop sleeve after it s, are an economical alternative is placed in the wall to the high cost of fabricating protective fire wall and floor penetration sleeves in the field. his firestop system provides a rigid support for cable tray in a U classified system approved for fire wall and floor penetrations. Cable trays are attached fter to both the sleeve is placed in the wall or floor, ends of the sleeve using standard the splice loose plate connectors collar slides over it. Hardware for the tray connection only is included. Hardware required to mount sleeves to the wall or floor is not included. 7 diameter holes for 3/8" hardware (not included) he Hilti Fire Block is a compressible fire stop brick, well-suited for installations where frequent cable changes may be required. Blocks are easily cut to fit any space, and can be removed and H*+6" reinstalled when cable configurations change. When exposed to fire, the blocks expand to lock the seal in place. Each cable tray firestop sleeve includes: One penetration sleeve with flanges One Hilti Firestop Putty Stick Hardware for cable tray connection to the wall sleeve: - Metallic and fiberglass cable trays with two side rails. he Firestop kit includes two pairs of splice plates with nuts & bolts; 316 stainless steel is recommended for use with fiberglass systems. Floor ssembly Number of Hilti Fire blocks included with each sleeve SEEVE Masonry nchors Side rail Height (in.) width Floor Firestop Sleeve Example 0440 used as a floor sleeve per U assembly W and C-J-3232 Wall ssembly (ypsum Wall Shown) ssembly (ypsum Wall Shown) djustablecollar djustablecollar Wall nchors Wall nchors wall/foor SEEVE DESCRIPION Designed for single runs of cable tray, having a height and width to match the tray system specified. One end of the 20 inch sleeve has a flange attached 6 inches from the end, while the flange for the other end is floating and is free to slide directly against the face of the wall as needed. he 20 inch length of the sleeve will accommodate a wall thickness of up to 8 inches. wall thickness of 8 inches will result in the sleeve protruding 6 inches from each side of the wall. Both ends of the sleeve are punched with holes for attaching cable tray splice plates or hardware needed for the tray system specified. installation he opening in the wall should be within 1 inch of the nominal height and width of the cable tray. he flanges of the sleeve have 7 diameter mounting holes for attachment to the wall using 3 /8" diameter hardware. Hardware for wall attachment is not included. fter the sleeve is mounted in the wall or floor, the cable trays on either side of the sleeve can be connected using the hardware supplied with the sleeve. When the trays are in place, the cables should be pulled through the wall and sleeve as needed. fter all of the cables are installed in the tray, install the Fire Blocks as described. ny voids between cables should be filled with the Firestop Putty Stick. Floor Firestop Sleeve Example 0440 used as a floor sleeve per U assembly F djustable Collar Floor ssembly Masonry nchors ECHNIC D Construction...arc Welded Sleeve Dimensions... 20" x ray Width x ray Height Flange Dimensions... (ray Width + 6") x (ray Height + 6") U Classification... Qualifies for use as an equipment grounding conductor per N.E.C Cross-sectional area and amperage ratings are based on the cable tray system attached to the sleeve. HII FIRE BOCKS INSION: Walls: shall be installed with 5" dimension projecting through and centered within wall assembly. Floors: shall be installed with 5" dimension projecting through opening, flush with the top surface of sleeve or recessed within sleeve at any level above the top surface of floor. Fire blocks fill the annular space between the cables and the sleeve. Fire Blocks may be cut to match the profile of cables or to fit opening. ny voids should be filled with 0618 Firestop Putty Stick. metallic firestop systems ll ssembly psum Wall Shown) justablecollar nchors Included) 58 djustable Collar Floor ssembly Masonry nchors U classified for use with: 2-hr concrete or block walls 2-hr concrete floors 1-hr gypsum walls 2-hr gypsum walls Side Rail Height 4 4" 5 5" 6 6" 7 7" wall penetration sleeve clog Numbering Example: Connector System No. Product No. 6M M Fitting Series his item must be specified as SERIES 2 Width 06 6" 09 9" 12 12" 18 18" 24 24" 30 30" 36 36" Fastener Options metallic firestop systems