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DM Chimney System: Lateral Support

After setting the DM inner liner starter piece, apply

mortar to the top of the starter liner. Continue the straight

chimney run by placing a full height inner liner onto the six inch

(6”) starter liner. The top of this full height inner liner will sit 6”

above the top of the outer casing block that was previously set.

This six inch (6”) offset between joints of the inner

liner stack and the joints of the outer casing stack continues to

the top of the chimney run.

Continue the straight vertical DM chimney by setting

an outer casing block onto the mortared top surface of the

preceding outer casing. The grooves on the bottom end of the

upper outer casing block fit onto the tongues on the top of the

lower outer casing block. This assures proper alignment of the

two components.

Next place a full height inner liner onto the mortared

top end of the previously set inner liner. Proceed this alternate

stacking of outer casing blocks and inner liners until the desired

height of the flue is attained.

Mortar all outer casing blocks together and mortar all

inner liners together. Do not mortar the space between the outer

casing and the liner.

Lateral Support for DM Chimneys:

Though not required, it is recommended that where

the DM chimney is built up along an exterior wall the vertical

chimney system can be connected to the structural wall system

at a minimum of four foot (4’) intervals. This connection can

be made using 18 gauge strap ties (Simpson Strong Tie CS coil

strap, or equivalent).

Starting on one side of the DM chimney, at four foot

(4’) intervals up the structural wall adjoining the chimney,

connect one 18 gauage strap tie to the structural wall with two,

three inch (3”) #8 (minimum) wood screws or masonry anchors,

as appropriate.

Next fold the strap around the three exposed sides of

the outer casing. Connect the strap to each of the three outer

casing faces with two, one and one-half inch (1-1/2”) long

masonry anchors, such as “Tapcon” or “Titen” screws. Fasten

the strap back to the structural wall with two three inch (3”) #

8 (minimum) wood screws or masonry screws, as appropriate.

(Figure 81)

Where DM chimneys are built up from the interior

walls the DM chimney outer casing block is to be laterally

braced at ceiling and roof penetrations.

Pressure treated two inch (2”) by four inch (4”) blocks,

set at each side of the flue between the trusses or rafters and

fastened to the pre-engineered roof trusses or rafters with two

16d common nails at each end, provides lateral support, parallel

with the framing. Additionally, a two inch (2”) by four inch (4”)

by six feet (6’) minimum pressure treated member (“rat run”)

installed on each side of and butted up to the outer casing block

will provide lateral support perpendicular to the direction of the

truss or rafter framing system.

Fasten the perpendicular member with two 16d common

nails to each intersecting truss or rafter. The perpendicular

bracing should be installed on the top side the ceiling level

framing as well as on the bottom side of the rafters. (Figure 82)

Note:

A firestop is required wherever a chimney passes between

one zone of a building to another. Ex: When the chimney passes

through the ceiling into the attic area, there must be a sealed

area around the chimney so there isn’t a chaseway for a fire to

get to the attic.

Содержание Magnum 86072-60

Страница 1: ... all current and future users of this product It is the responsibility of the general contractor and the installer of this product to ensure that the instructions in this manual are followed exactly and further that any allowed gas log appliance used in this product be installed in strict accordance with NFPA58 NFPA54 ANSI Z223 1 and the gas log manufacturer s explicit installation sizing and oper...

Страница 2: ......

Страница 3: ...ances to Insulation and Vapor Barriers Flush Wall Fire Brick Finish Detail Flush Wall Brick Finish Detail Interior Masonry Veneer Fireplace Finishes Clearances Masonry Veneer Construction Details Non Combustible Finished Facing Requirements Clearance to Combustible Trim Concrete Support DM Chimney System General Information Component List Dimensions Component Weights DM Installation Lateral Suppor...

Страница 4: ...ey system The basic chimney consists of an outer casing block and an inner liner Two 2 flues are necessary on the 86072 model without a mechanical drafting system It is acceptable to use mechanical draft systems if the venting companies do the engineering calculations and make the necessary recommendations for fan size and flue vent diameter following the guidelines of NFPA 211 2006 pg 211 13 Inst...

Страница 5: ...chimney system The FTF 13 or equivalent chimney system only must be used with the Fire Lite application Contact the Technical Department at 800 642 2920 for details This fireplace is intended for use as a supplemental heat source only and is not intended for heavy use as a primary heating system Overfiring abusive burning or mistreatment will void any claims eg burning construction debris or other...

Страница 6: ...ightly sealed and has modern energy efficient features the optional combustion air supply kits may not provide all the air required to support combustion and the proper flow of combustion gases up the chimney The manufacturer is not responsible for any smoking or related problems that may result from the lack of adequate air supply flowing into the house It is the responsibility of the builder con...

Страница 7: ...suitable for use with solid fuel or listed gas appliances Refer to the manufacturer s installation manual for detailed description of clearances to combustibles and all other installation information A metal listing label similar to that shown above is affixed to each Magnum 86072 Series fireplace Do not remove the listing label from the Magnum 86072 Series fireplace Prior to beginning installatio...

Страница 8: ... 8 TOP PLATE TWO REQUIRED Part No M77 Fireplace Size 60 W Quantity 2 2 5 1 0 3 4 4 N M Right Section Front Elevation Top Plan View Plan Section F 69 3 4 57 1 4 M 14 1 2 14 1 2 N 10 3 4 10 3 4 32 3 4 A 85 1 2 73 1 2 C 85 3 4 85 3 4 E 69 G 55 1 2 65 1 2 C D H G I K F E E B A J B M77 72 W 2 81 1 4 Weight 88 1 2 W x 87 1 2 H x 29 2950 lbs O 55 1 2 65 1 2 O ...

Страница 9: ...1 72 2 Top Medium Part Fireplace Quantity No Size 11 60 2 11 72 2 Top Large Part Fireplace Quantity No Size 13 60 6 13 72 6 Top Sloping Part Fireplace Quantity No Size 34 60 4 34 72 4 Backwall Part Fireplace Quantity No Size M67 60 8 M67 72 8 Damper Support Left Part Fireplace Quantity No Size M94L 60 1 M94L 72 1 Damper Support Right Part Fireplace Quantity No Size M94R 60 1 M94R 72 1 43 28 6 1 4 ...

Страница 10: ...nd chimney surfaces See exception Exception If insulation is used in walls surrounding the fireplace insulation may be installed behind sheathing of gypsom board plywood particle board or other material on the side facing the Isokern The facing material cannot be within 1 1 2 to the fireplace sidewalls Notes A The Magnum 86072 Series fireplace must sit upon a concrete support slab designed to bear...

Страница 11: ...num 86072 Series fireplace The following chart of dimensions is intended to aid in the positioning of an Magnum 86072 Series 86072 fireplace in a corner condition where the DM chimney must turn 45 degrees to align with overhead framing Firebox A B C D Model 60 73 1 2 39 53 1 2 102 1 2 Model 72 85 1 2 45 62 111 To turn flue 45 first set one offset block on the firebox so that the chimney offsets 3 ...

Страница 12: ... as directly as possible from the Magnum 86072 Series fireplace Few to no bends with a maximum length of sixty feet 60 WARNING Do not use combustible duct material Avoid installing a combustion air inlet where the opening could be blocked by snow bushes or other obstacles Air inlet must terminate a minimum of three feet below the chimney cap level Air inlet ducts shall not terminate in attic space...

Страница 13: ...f 1 4 to 3 8 in the brick work is recommended and has the best appearance Other face joint dimensions are acceptable however smaller joints may not leave room for heat expansion of fire brick 3 Start the fire brick at the front edge of the floor of the Isokern firebox proceeding inward toward the back Let the floor brick gap approximately 1 2 off the back wall and side walls This air space allows ...

Страница 14: ... 2 beyond the face of the rough framing members that create the room s wall surface Noncombustible facing material must span framing members above the fireplace opening for drywall to keep the required twenty four inches 24 above the firebox opening top It is after this noncombustible material that framing members can be placed as shown above Nine inches 9 on each side of the firebox opening is al...

Страница 15: ...gement Figure 15 The stack of four fire box side wall components will be assembled in conjunction with the firebox back wall components described in the following steps Step 3 Back wall part 67 eight pieces required to be field modified Cut the tongue off one end of each of the four 67 back wall components as shown After cutting four of these cut pieces should measure 38 1 2 from the cut end to th...

Страница 16: ...lls Figure 21 Mortar between the steel and the notch in the top of the side wall is not needed Step 7 Damper support front rear Part 69 four required to be field cut to fit Bevel cut one end of each of two 69 damper supports to 35 1 2 in length from the long point of the bevel cut to the un cut square end Figure 22 The long point of the bevel cut is to be at the top of the damper Support For best ...

Страница 17: ...r supports right and left is designed specifically for its own side of the unit When properly set each damper plate side piece sits flush with the outside face of the firebox side wall The interior bottom edge of the damper support end pieces aligns with the angle of the interior of the firebox side wall Figure 25 For the Magnum 86072 60 the smoke dome components stack two tiers high giving a smok...

Страница 18: ...s 39 3 4 bottom length on top of and flush with the first tier of smoke dome components at the back of the first course of smoke dome The haunched un cut end of this piece should be flush with the haunch end of the first tier smoke dome below it Figure 32 Step 17 Repeat this arrangement at the front of the smoke dome Step 18 Cut each of the remaining two smoke dome medium pieces part 11 at an angl...

Страница 19: ... dome assembly and rests on the smoke dome sloping side wall At the recessed edge on the underside of the un altered ends of each of the two top plates the thickened part of the top plate will need to be ground down flush with the recessed edge of the top plate so that the underside of the top plate does not ride high on the smoke dome sloping sidewall Place the two top plate components on top of ...

Страница 20: ...nts will be assembled in conjunction with the firebox back wall components described in the following steps Step 3 Back wall part 67 eight pieces required four pieces to be field modified Cut the tongue off one end of each of the four 67 back wall components After cutting each of these four cut pieces should measure 38 1 2 from the cut end to the shoulder of the un altered end Figure 40 Step 4 Bac...

Страница 21: ...t hand walls and run to a point four inches back toward the firebox Figure 45 The steel angle sits in this notch The six inch leg of the steel angle is in the vertical position and is to be located in alignment with the front of the firebox The ends of the steel angle should not protrude beyond the outer firebox side walls Figure 45 Mortar between the steel and the notch in the top of the side wal...

Страница 22: ...r plate side piece sits flush with the outside face of the firebox side wall The interior bottom edge of the damper support end pieces align with the angle of the interior of the firebox side wall Figures 48 49 For the Magnum 86072 72 the smoke dome components stack two tiers high giving a smoke dome of approximately 32 inches in height Step 12 Smoke dome top large part 13 six required to be field...

Страница 23: ...cut off and 49 3 4 bottom length on top of and flush with the first tier of smoke dome components at the back of the first course of smoke dome The haunched un cut end of this piece should be flush with the haunch end of the first tier smoke dome below it Figure 55 The overall length of the two joined smoke dome pieces should be 73 1 4 Step 18 Repeat this arrangement at the front of the smoke dome...

Страница 24: ... the smoke dome Figure 61 The top width dimension of the completed smoke dome should measure 64 1 2 Figure 58 Each top plate has a width dimension of 32 3 4 inches Two of the top plates butted together should cover the smoke dome top with minor overhang which is acceptable The top plates should be flush with the top sides of the smoke dome assembly Note Be sure to put Earthcore Mortar on the conta...

Страница 25: ... the Isokern DM system on the model 86072 dual chimney system is 22 without additional structural support A structural engineer should be consulted for any DM installation over 22 0 BKE Report dated March 30 2011 22 0 DM Chimney System 86072 ...

Страница 26: ...not build a combustible framed wall out in front of the Magnum 86072 firebox If combustible sheathing and framing are to be installed across the front face of the Magnum 86072 smoke dome then the framing and sheathing must be held a minimum of twenty four inches 24 above the top of the Magnum 86072 firebox opening This means that combustible framing and sheathing across the smoke dome front must b...

Страница 27: ...ot maintained due to construction subsequent to the installation of the Isokern unit It is the general contractor s responsibility to assure that listed clearances to combustible framing and to insulation are maintained throughout the construction of the project subsequent to the installation of the Isokern unit To avoid causing a fire resulting in damage to property personal injury or loss of lif...

Страница 28: ...glass cellulose and other insulation anything that carries an R rating a minimum of three inches 3 away from all firebox and chimney surfaces Exception If insulation is used in walls surrounding the fireplace insulation may be installed behind sheathing of gypsom board plywood particle board or other material on the side facing the Isokern The facing material cannot be within 1 1 2 to the fireplac...

Страница 29: ...nish of the Magnum 86072 Series fireplace front when the code required noncombustible finished facings are applied This alignment of fire brick application as shown above Figure 68 allows the fire brick lining to be in the same plane with the room s wall finish surface With the fire brick set in this fashion the noncombustible finish facing material can be set tight against the leading edge or roo...

Страница 30: ...ent of the code required noncombustible finish facing material set across the top of the firebox opening Figure 69 WARNING Avoid false chimneys Important Failure to seal any gaps between the front face of the Magnum 86072 damper plate and the back of the noncombustible finished facing material will create what is known as a false chimney A false chimney in this case is the narrow gap mentioned abo...

Страница 31: ...DTH DIM N EXTENT OF STEEL L MAX 4x6 STEEL L MASONRY VENEER ALIGN ALIGN ENDS OF ISOKERN STEEL LALIGN FIREBOX UNIT AND SHEATHING WOOD FLAMMABLE MIN 6 MASONRY VENEER 4 Fire Brick Sidewalls 4 31 Interior Masonry Veneer Fireplace Finishes Clearances FIGURE 70 FIGURE 71 ...

Страница 32: ...y veneer as it spans over the firebox opening Figures 70 71 By code requirement this steel L must have a minimum four inch 4 end bearing This bearing surface area shall be provided in the veneer work Figure 72 It is important that the steel L is set tight against the Magnum s damper beam front and set in a mud joint to avoid creating a false chimney between the back of the steel L and the Magnum s...

Страница 33: ...sides of the fireplace opening which project more than one and one half inches 1 1 2 from the face of the fireplace shall have additional clearance from the nine inches 9 equal to the projection Combustible projecting mantles up to twelve inches 12 of projection shall not be placed less than thirty eight inches 38 from the top of the fireplace opening Combustible mantles which project more than tw...

Страница 34: ... or steel and capable of supporting the slab Isokern unit and the chimney For multi floor and back to back installations proper weight computation on an individual basis is required Consult local structural engineer for load bearing requirements Important Foundations and footings must meet local code and be approved by the local building authority For any foundation design and load requirements ch...

Страница 35: ...attic area there must be a sealed area around the chimney so there isn t a chaseway for a fire to get to the attic Since lateral support is required for DM chimneys the framing members will be in contact with the DM chimney system Important Combustibles are defined as normal construction materials and are considered to be framing materials particle board mill board drywall plywood paneling plywood...

Страница 36: ...ensions 36 2 1 1 1 1 6 1 6 2 1 6 2 1 Ø 1 4 12 Ø 1 4 12 2 5 6 3 3 2 6 3 2 6 3 7 3 3 7 3 1 3 3 1 1 1 Small Crown Cap Large Crown Cap Brickledge 6 High Inner Liner 12 High Inner Liner Outer Casing Offset Block in sequence Offset Block ...

Страница 37: ...nforced concrete footing and slab area may need to be provided adjacent to or as a continuation of the primary support slab area for bearing the steel or masonry support required for an offset sequence See pages 40 42 following Notes Plan chimney configuration carefully before constructing the required reinforced concrete support foundation for the Magnum 86072 Series fireplace Be sure that enough...

Страница 38: ...he flue hole in the smoke dome lid Next set the DM inner liner s six inch 6 tall starter piece Figure 79 inside the first outer casing block The factory version of the six inch 6 tall inner liner starter piece has a female end and a flat end Set this inner liner starter with the flat end down Set the downward end into Earthcore Mortar so that it is fully sealed to the smoke dome lid WARNING Do not...

Страница 39: ...the DM chimney at four foot 4 intervals up the structural wall adjoining the chimney connect one 18 gauage strap tie to the structural wall with two three inch 3 8 minimum wood screws or masonry anchors as appropriate Next fold the strap around the three exposed sides of the outer casing Connect the strap to each of the three outer casing faces with two one and one half inch 1 1 2 long masonry anc...

Страница 40: ...40 DM Chimney System Lateral Support cont FIGURE 81 FIGURE 82 ...

Страница 41: ... offset block is set to avoid creating overhanging ledges on the inside of the flue Such internal overhangs will inhibit flue drafting Each offset block is to be set fully in a bed of Earthcore Mortar completely sealing each offset block to the underlying component Offset chimney block sequences can be built to shift the chimney run to the left right or to the rear of the firebox smoke dome assemb...

Страница 42: ... will leave a distance of 6 3 4 from the face of the Magnum 86072 firebox smoke dome assembly to the face of the DM outer casing block This allows for the smoke dome to sit flush with the inside face of the 2 by 6 wall and the straight chimney to run up the outside of the wall Figure 86 For a wall thickness of 9 nominal 8 CMU plus 1 1 2 furring strip first set two offset chimney blocks in sequence...

Страница 43: ...offset block sequence will require take the total number of offset blocks needed to accomplish the travel distance described above multiplied by 6 This number is the height inches that the offset sequence will require When establishing the far face of the overhead obstruction be sure that the DM chimney blocks can run straight to chimney termination without further overhead obstruction since a sec...

Страница 44: ...of line will increase above 34 relative to the pitch of the roof As the DM outer casing and inner liner assembly approaches the roof penetration set an outer casing block to a level of approximately 6 below the low side of the roof framing Figure 94 The alignment tongues on the top of this outer casing block must be ground off to leave a flat contact surface for the brickledge Temporarily leave ou...

Страница 45: ... been installed on the brickledge be sure to brace the chimney following the guidelines on page ___ of this manual for Lateral Support of DM chimneys Load Capacity for DM Brickledge ThesourcesofloaddeliveredintotheIsokernbrickledge are 1 the total physical load of brick stone or other masonry veneer on the brickledge and 2 loading due to the force of wind delivered against the exposed height of th...

Страница 46: ...uter casing block that fully clears the roof line Keep the flashing to about a one half inch 1 2 lap onto the top of the outer casing block The twenty inch 20 square hole in the flashing should fit to the outside of the alignment grooves on top of the DM outer casing Continue the DM chimney up to the required termination height Once the masonry veneer is in progress the inner flashing is set into ...

Страница 47: ... Large Crown Cap Figure 98 The DM large crown cap is a prefabricated cement weather cap for masonry veneer chimneys The large crown cap measures 37 1 2 square and is 3 thick at its center The component has an octagonal hole at its center so that the top inner liner of the DM chimney stack can pass through it The crown cap then sits on the top most DM outer casing block To set the large crown cap t...

Страница 48: ... safety but does not ensure smoke free operation of the fireplace Trees buildings adjoining roof lines adverse wind conditions etc may require a taller chimney for the fireplace to draft properly Chase Enclosures DM chimneys can be enclosed within a wood framed chase at zero clearance to wood framing members Chase enclosures need to be built to local wind load requirements and shall be structurall...

Страница 49: ...s the Magnum 86072 firebox opening when assembling the unit as a structural lintel This steel lintel shall span the Magnum 86072 firebox opening bearing fully on the front 4 inches of the firebox side wall components The vertical leg of the angle steel lintel should turn up and sit in front of the Magnum 86072 damper beam component Figure 102 Important For DM chimneys with both offsets and a brick...

Страница 50: ...e to owner preference and architectural design criteria other chimney terminations can be used alone or in conjunction with the crown caps Special design caps may be designed and constructed by others and must be fashioned so as not to restrict the flow of smoke and gasses out the top of the flue opening Figure 105 depicts common chimney terminations Check with local building codes to establish th...

Страница 51: ... metal flue design can be from the following types 1 Non insulated completely thermal siphoning double wall air cooled solid fuel rated chimneys listed to UL 103 ULC S629 2 Double wall with solid pack insulation 3 A combination of double wall solid pack insulation and air space triple wall 4 Triple wall air space solid fuel chimney 5 Listed chimney liners conforming with the seventeen hundred degr...

Страница 52: ...follow the first fire The second fire should be the same as the first fire The second fire should burn for no more than thirty to sixty minutes and allowed to go out Do not refuel the fireplace during the second lighting A twenty four hour cooling off period must be ob served following second lighting After first and second fire continue use of the unit with three or four small fires of short dura...

Страница 53: ...y during the heating season in colder climates thoroughly inspect the Fire Lite fireplace and chimney system Chimneys must be installed so that access is provided for inspection and cleaning The chimney should be inspected monthly during the heating season Inspect the entire flue from the top down for obstruc tions such as birds nests leaves etc Such obstructions must be removed Check spark arrest...

Страница 54: ... _____ Isokern Standard _____ IBV ______ Vent Free _____ Green Tech _____ ISO ven _______ Fire Lite Stand Circle One Yes No Gas Control Valve Type Circle One Remote Control Safety Pilot Gas Type Circle One Natural Gas Propane Buyer Date of Installation Completed ________________________________________________ Name _______________________________________________________ Address ___________________...

Страница 55: ...55 Notes ...

Страница 56: ... thereof is not responsible for any labor costs or indirect costs incurred for the replacement of defective components ISOKERN is not responsible for misuse or mishandling of components Nothing in this warranty makes ISOKERN or any division thereof liable in any respect for any injury or damage to the building or structure in which the fireplace or chimney system has been installed or to persons o...

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