ALTERNATIVE RESIDENTIAL CONSTRUCTION SYSTEMS

Shimberg Center For Affordable HousingDirector - Dr. Robert Stroh

ALTERNATIVE RESIDENTIAL

CONSTRUCTION SYSTEMS

Second edition

JANUARY 2001

Compiled By Daniel Bentil

M.E. Rinker, Sr. School Of Building ConstructionCollege Of Design, Construction and Planning

University Of FloridaGainesville, Florida

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PREFACE

The second edition of this manual comes five years on the heels of its highly-demanded predecessor. It attempts not only to update the informationcontained in the first edition but also to introduce the latest innovations inalternative residential construction. Some systems have adapted to keep upwith an increasingly technologically- minded construction industry while othershave failed to survive for a variety of reasons.

Some have been replaced by newer systems designed to fulfill a broad rangeof residential and light industrial construction needs. As a consequence, notall the systems in the first printing appear in the second. Inclusion or exclusionin this report is by no means an endorsement or condemnation by theShimberg Center for Affordable Housing and the University of Florida.Information was provided by manufacturers' publications and advertisements.

It would be beyond the scope of this manual to include all the innovativealternatives the industry offers. Designed as a quick reference guide, thisedition attempts to present a cross-section of available alternative residentialconstruction and light industrial systems.

Some of the new material in the second edition include the addition of e-mailaddresses and website references when available, and required tools forconstruction.

Before adopting any alternative construction system for a home-buildingproject, several factors must be considered. These factors constitute majorbarriers to the introduction of new building systems. For example:

(1) Before deciding on a specific system, it is necessary to check withthe local building department to determine if the materials areacceptable under local construction codes.

(2) Since erecting the building requires a trained work force, it isimportant to determine if appropriately trained workers areavailable.

(3) As construction proceeds, there may be a need for an additionalquantity of materials due to loss or breakage. It is important todetermine if additional supply is available.

(4) Once the shell of the home is erected, other tradespeople such aselectricians, plumbers, and HVAC system installers must be able tofunction. It will be important to determine if the chosen buildingsystem affects their ability to do their job.

(5) After the home is occupied, the home owner will be faced withmaintenance and repairs. Once again, the question of availableskilled work force and adequate supply of materials needs to beconsidered when choosing a system.

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The Shimberg Center for Affordable Housing hopes that this report willenhance the reader’s awareness about some of the alternatives to lumber andconcrete block for residential construction. It must be emphasized thatassembling this material in one report should not be considered as anendorsement by the University of Florida, the M.E. Rinker, Sr. School ofBuilding Construction, or the Shimberg Center for Affordable Housing.

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TABLE OF CONTENTS Page

AUTOCLAVED AERATED CONCRETE 5HEBEL BLOCK 8AACO 10

BALLOON CONCRETE FORMWORK 12INSTAHOME 14

FORMLESS CONCRETE CONSTRUCTION 16ICS 3-D PANEL SYSTEM 18

INSULATING CONCRETE FORMS 22AMHOME 27ECO-BLOCK 30INSULFORM WALL SYSTEM 33

STEEL SYSTEMS 36

STRUCTURAL INSULATED PANELS 41R-CONTROL 43

TILT-UP CONCRETE PANEL 46ROYALL WALL 48

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Autoclaved AeratedConcreteAutoclaved aerated concrete (AAC) was developed by Swedish architectJohann Axel Eriksson in the early 20th century and patented in 1924. Thematerial is a mixture of sand, lime, cement, gypsum, water and anexpanding agent that is cured in a pressurized steam chamber, called anautoclave, producing a cellular lightweight material.

Though relatively new to the United Statesconstruction industry, AAC is available fromdifferent manufacturers throughout thecountry. One is affiliated with Germanconglomerate Hebel. The company hascommitted to full-scale production of AAC inthe U.S. by building a factory in Georgia.Manufacturers produce AAC in differentblock sizes, reinforced and unreinforced

panels for floor, wall and roof systems, pre-assembled wall sections andspecially manufactured shapes. It is an inorganic structural and insulationmaterial that contains no toxic substances.

Environmental friendliness, insect resistance, fire resistance and thermalratings are some of the benefits manufacturers tout. Its light weight alsomakes it easy to use, though some masons have complained about usingboth hands to handle a piece due to the lack of cells in the block.Costs range from 1% to 5% more than traditional construction butmanufacturers point to savings realized in low energy consumption,maintenance, pest control and insurance premium costs as greater than anyinitial construction cost disadvantage.

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AdvantagesEnergy Efficiency - AAC construction systems provide excellentthermal insulation. Energy performance analysis shows a house builtwith an eight-inch external wall using an AAC wall system performsbetter than a house with a traditional stud wall system with R-30insulation.

Simple Construction - AAC is easy to use on the construction site.Conventional woodworking tools can be used to saw or install nailsand anchors.

Fire Resistant - An eight-inch AAC exterior wall unit provides fireresistance ratings of at least four hours, per ASTM E119 testing.Four-inch interior wall units have at least a two-hour rating.

Environmentally Safe - AAC products are made of environmentallysafe materials. No pollutants or toxic by-products areproduced in the manufacturing process or are present in the finalproduct.

Lightweight - AAC products weigh as little as one-fifth the weightof standard concrete, resulting in lower transportation and handlingcosts.

Weather Resistant - Structures built with Autoclaved AeratedConcrete can be designed to withstand hurricanes, high winds orearthquakes.

Pest Resistant - Autoclaved Aerated Concrete is impervious to attackby insects.

Proven Durability - Structures built years ago are still sturdy todayand continue to require little maintenance.

Acoustically Efficient - Walls, floors and roofs constructed of AACreduce the transmission of sound (STC) and meet local buildingcodes.

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Versatile - Autoclaved Aerated Concrete blocks and reinforced panelscan be used for both load-bearing and nonload-bearing interior orexterior walls, floors or roofs. AAC also can be shaped forornamental and functional architectural details and interior built-ins.

DisadvantagesNew Product - Relatively new in the U.S. market and may requiresome further exposure to ensure workers are comfortable whenworking with AAC. Some manufacturers offer installation training.

Limited Distribution - Presently sold through dealers in the Southeastand Texas. May not be available in some states or may requireextremely long lead times.

Code Approval - Holds compliance report from Southern BuildingCode Congress International. Code officials in other jurisdictionshave to approve before use.

Additional InformationContact the Aerated Autoclaved Concrete Block Association for a list ofAAC producers.P.O. Box 15336652 Highway 41 NorthRinggold, GA 30736(706) 965-30736url: www.babb.com

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HEBELMatrix PAAC, LP6600 Highlands PkwySuite ASmyrna, GA 30082800/994-3235770/308-1500770/308-1515e-mail: [email protected]: www.matrixpaac.com

Hebel AAC is produced in a plant in Adel, GA. It is a light weight, precastbuilding material of a uniform porous structure. Hebel AAC is made fromnatural basic materials: silica sand, lime, cement, water and a cell formingexpanding agent.

Product Information

Hebel AAC for residential construction includes high-precision, wall-construction units, Hebel thin-bedmortars, lintels, Hebel solid stairways, Hebel ceilingsupport units, floor panels, roof panels, interior andexterior plasters and stuccos, Hebel plaster and stuccoaccessories, U-sections and Hebel approved basementmoisture protection.

Installation

ToolsHebel provides a full range of tools that are specially designed to assist theblock mason and increase productivity at the job site. These include:

- Rubber Mallet - Hebel Hand Saw - Hebel Square- Sanding Float

- Mortar Stirrer

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Block laying also will require the following standard masonry tools: 4 ft. Level, masonry string line, standard drill for mixing thin-bed mortar,steel trowel, small hand brush for cleaning.ProcedureHebel wall units must be laid on an ASTM C270 Type M mortar bed,while using Hebel thin-bed mortar for vertical joints. Use a felt stripbetween the first course and foundation or slab-on-grade to prevent risingof dampness and to act as a bond breaker. The first course must be laidwith precise alignment and must be level. This step will ensure subsequentcourses are easily aligned and leveled.Hebel blocks must be laid using Hebel thin-bed mortar. Add only water tothe pre-mixed mortar and use in accordance with the instructions written onthe bag.

Hebel thin-bed mortar is applied to the vertical andhorizontal surface using a Hebel notched trowel. (Trowelwidth = Hebel block width)

A rubber mallet is used to level and alignthe Hebel block.

A handsaw or electric bandsaw can be used to cut the blocks. Hebel blockcan be easily drilled and nailed. Routing for pipes and wires can be donemanually or by using an electric routing tool.

Note: Hebel block can be drilled or notched easily if re-bar is required.Wall surfaces allow most types of surface finishes, including stucco, plasterand drywall. Ceramic tiles are applied easily on Hebel wall surfaces usingthin-set tile mortar.

CostPrices are quoted on a job-by-job basis.

DeliveryDelivery times are quoted on a job-by-job basis.

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ACCO3351 West Orange Blossom TrailApopka, FL 327121-888-901-ACCO (2226)407-884-0051407-884-5111 (fax)e-mail: [email protected]

url: www.acco-aac.com

ACCO-AAC is produced in a plant in Apopka, Florida. It is comprised ofroof, floor, and wall panels, block, lintel and U-block configurations.Blocks larger than 8 inches are available with or without reinforcementchases. AACO can be used for load and non-loadbearing applications.

Product Information

Width Depth Length HeightRoof Panel 2' 6", 8", Up to 20'

9.6", 12"

Floor Panel 2' 6", 8" Up to 20'9.6", 12"

Vertical Wall Panel 2' 6", 8" Up to 20'9.6", 12"

Horizontal Wall Panel Up to 20' 6", 8" 2'9.6", 12"

Block 4", 6", 8" 24" 8", (10", 12"(8" and wider blocks 9.6", 12" custom)Available withReinforcing chases)

Lintel 8", 9.6",12"

24" std./ 8"

up to 96"

U-Block 8', 9.6", 12" 24" 8"

Wall PanelsPrecast wall panels are individually designed to specified criteria andreinforced, accordingly, with corrosion protected steel cages. Equalamounts of steel reinforcement are provided to both faces of the wall

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panels. The edges of wall panels come with a standard chamfer. Panelswithout chamfer can be special-ordered. They are availalble in vertical andhorizontal configurations.

Roof Panels

Precast roof panels can be combined to form avariety of designs including gables, mansards andbarrel vaults. Panels are produced to designspecifications and reinforced accordingly.Reinforcement cover is adjusted for specificserviceability requirements. Chamfers are standardon the roof panels as well, but can be specially-ordered without chamfers.

CostIncluding labor and finishes, ACCO AAC costs range between $11 to $14per square foot for wall systems (block and panels). This does not includestructural steel. Roof and floor systems range between $9 to $10 psf. Thisdoes not include membranes, VCT and other components.


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BalloonConcreteFormworkThis system uses a specially-constructed balloon over which foam concreteis sprayed and kept in place by chemicals. It is marketed by MankindResearch Foundation Inc., Silver Spring, Maryland as the InstahomeSystem. It can be used for different construction designs.

The system is based on using an inflated balloon as a single form for astructure. The balloon is inflated with bumps that form the window anddoor holes. The frames for the opening are put in place at this time. One-half the concrete thickness is sprayed onto the form. Welded wire mesh iscut to the size of the form and concrete-sprayed in place to strengthen thestructure. The outside concrete wall thickness is then sprayed in place. Thearch of the dome gives added strength to the roof. The balloon is deflatedand removed when the concrete hardens. The concrete mix used is"Foamcrete" which has a higher proportion of air bubbles.

This technique is best suited to the construction of a series of side-by-sidehomes because the balloon can be set up for the next building whilepartitions for the previous one are being set in place. The system utilizessingle-sided forms for interior partitions.

AdvantagesCode Conformance - Four inch thick "Foamcrete" with welded wiremesh conforms to the American Concrete Institute Building CodeRequirements for Reinforced Concrete 318.83.

Strength - Basically a concrete building with concrete strength andproperties. The welded wire mesh is fabricated with strong steel andheavy wires welded vertically and horizontally in a grid. This gridhelps distribute the loads and resist cracks. Hooked steel bars are

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used to lock floor, walls and roof together. These connections aredesigned to withstand 130 mph winds.

"Foamcrete" - Extra air is introduced into the mixture giving ahigher air-cement ratio that improves insulation, gives better sound-proofing and resists cracks.

Low Cost - "Foamcrete" is 40% air bubbles, giving 40% more cubicyards of concrete at no extra cost. The mixture is shortcreted ontothe form (using a pump and hose). This is the quickest way to placethe most concrete with the greatest precision and the least labor.

Construction Speed - Because of the high air content, "Foamcrete"sets faster than conventional concrete allowing subsequentconstruction to proceed. Set-up and dismantling of one-sided formsare quicker than conventional forms.

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INSTAHOMEMankind Research Foundation1315 Apple AvenueSilver Spring, MD 20910301-587-8686

The Instahome system uses balloon framing technology to constructdifferent types of buildings including residential structures. The systemincludes the concrete mix , a proprietary formulation, the forming system,foaming system, concrete mixer and application method. It is well suitedfor multiple home construction.

Product InformationMaterial: The concrete mix is a proprietary formulation that includes:

Cement: Standard Portland Cement #1.Sand: Standard coarse sharp concrete sand.Foaming Agent: ProprietaryAccelerator: Proprietary agent that hardens concrete so rapidly it can

be walked on in 30 minutes and forms stripped for re-use on next section.

Super Plasticizer: Proprietary agent to permit minimum use of waterallowing concrete to dry faster.

Water:Other Additives: As required for specific conditions.

Forming System: Proprietary system using one or more of the following.One-sided Form: The mix is sprayed under pressure against the form with

a hose.Two-sided Form: Conventional with the mix poured into the form.Balloon: Set up in the shape of the desired structure. The

concrete mix is sprayed against the form. The balloon isdeflated and removed when the concrete hardens.

Metal Forms: With surface patterns (bricks, wood, fieldstone, etc.) toproduce desired effects.

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Wooden Forms: With attached proprietary plastic pattern (bricks, wood,fieldstone, etc.) which can be stripped when concretehardens.

Foaming System: Foam generator using proprietary controlled foamingagent. The agent is introduced into the concrete duringmixing.

InstallationConcrete MixerComputer-controlled mixer producing 60 cubic yards of "Foamcrete" perhour. Contains all the equipment for storing, measuring all the ingredientsfor the recipe, mixing and propelling the mixture to the point of use.

ProcedureThe mixer pumps "Foamcrete" to five hosemen simultaneously working onfour houses. The first hoseman places the slab and foundation for House#1. The second hoseman places the interior walls for House #2. The thirdhoseman places the outside walls for House #3. The fourth hoseman placesthe roof for House #4. The fifth hoseman places the sidewalk and curbs.

CostUsing the Instahome system in place of conventional methods saves 45% inthe construction of a 1200 sq. ft. economy home. Most of the savings arerealized in foundation, framing, exterior walls and roofing.


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FormlessConcreteConstructionFormwork costs for conventional concrete construction can range between40% to 60% of total concrete costs. While alternatives may cost more,savings can be realized in the time not spent in setting up and strippingforms.

One alternative on the market involves shortcreting a concrete mix onto astay-in-place three dimensional panel. This eliminates the time element insetting up and stripping forms which are a major part of concreteoperations.

Advantages Design Flexibility - Panels can be adapted to curved/arched design

applications.

Reduced Heavy Equipment Requirements - Handling andinstallation requires little equipment and reduces manpower needs.

Fewer Specialized Trades Required - The need for framing,masonry, insulation and drywall trades reduced or eliminated.

Simplified Utility Construction - Easy installation of electricalconduit and plumbing.

Reduced Construction Time - Not uncommon for a few workers toerect the shell of a 2,500 sq. ft. structure in less than a day. Earliercompletion means earlier occupancy that translates into lower totalcapital investment and a quicker return on investment.

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Excellent Thermal/Sound Barrier - Modified expanded polystyrenecore meets all VA, FHA and HUD thermal requirements; double shellconfiguration minimizes sound transmission.

Lower Maintenance Costs - A concrete structure with minimalmaintenance requirements.

Environmentally Intelligent - Made from recycled steel; polystyrenecore does not contain CFC; system does not deplete forest products.

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ICS 3-D PANELSYSTEMICS 3-D Panel Works, Inc.2610 Sidney Lanier DriveBrunswick, GA 31525912-264-3772912-264-3774(fax)

The ICS 3-D Panel System was developed by EVG of Austria andmanufactured by ICS 3-D Panel Works, Inc. of Georgia. It consists of amodified polystyrene core, flanked by two outer layers (one on each side)of 2" X 2" welded wire mesh, connected by galvanized truss wires weldedto the meshes. Field applied shotcrete bonds the components together toproduce a high strength, thermally and sound insulated wall. The panels'light weight allow for lower shipping costs, easy job-site handling and rapiderection/installation.

Insteel 3-D Panels meet CABO one-and two-family dwelling code whichsatisfies all SBCCI, ICBO and BOCA requirements for standard buildings.Panels also have HUD compliance under SEB #1120.

Product Information

Panels are 4 feet wide and can beproduced in any length with 8inch increments. Panel thicknessrange from 3-1/4 to 5-1/4 inchesdepending on specifiedpolystyrene thickness.

Polystyrene - The modified expanded polystyrene, with a minimumdensity of 0.9 pounds per cubic foot, is held 1/2" or 3/4"from each face of the wire to permit the wire to be

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embedded in approximately 1"- 2" thick concretemixture with 2,500 psi minimum. The foam core has aflame spread index of 25 or less and a smoke developedrating of 450 or less when tested in accordance withASTM E84; a potential heat of 6,000 BTU/ sq. ft. orless when tested in accordance with NFiPA 259.

Reinforcement Module- The welded wire fabric conforms to ASTMA185. The diagonal cross wires, as well as wireused in the fabrication of the welded wire fabric,conform to ASTM A 82. Differentconfigurations of reinforcement/insulationmodule are manufactured depending on the enduse.

Fire Resistance: The following configurations of the Insteel system carrythe corresponding fire ratings.

Concrete each side Core Fire RatingStandard Panel 1 1/2" 2 1/2" 1 1/2 Hrs.Light Panel 1 1/2" 1 1/2" 1 1/2 Hrs.Maximum Panel 1 3/4" 2 1/2" 1 3/4 Hrs.2 Hour Section 2" 2 1/2" 2 Hrs.3 Hour Section 2 1/2" 2 1/2" 3 Hrs.4 Hour Section 3 1/8" 2 1/2" 4 Hrs.

Installation

ToolsTools required for installing the ICS 3-D Panel System include a pneumaticICS Fastener Tool, fastener rings or clips, reciprocating saw(with aminimum 8" metal cutting blade), a 7-1/4" circular saw with metal cuttingblade, wire loop ties and hand twister tool, basic construction hand tools,screed material, concrete pump, finishing tools (trowels, sponges, darbys),air compressor and lumber braces.

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ProcedureString lines are used to establish wall lines. The first two panels are placedperpendicular to each other, forming a corner, and clamped together withthe pneumatic fastening tool. The panels are then braced to align the tops.Strips of 2" X 2" cover mesh are pneumatically fastened to the panels toreinforce the seams. Pre-formed mesh with 90 degree bends are used forthe corners. Panels can be cut for engineered openings. Pressure treatedlumber is placed recessed into the panels or a prefabricated frame is hung inplace to frame the openings. A strip of mesh is used to reinforce thecorners and prevent the concrete from cracking.

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Utility wires and piping can be run in thespace between the polystyrene and the wiremesh. Concrete is applied to the panel faceeither by shotcreting or poured into formserected on both sides of the panel.



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Insulating

ConcreteForms

Insulating Concrete Forms have becomevery popular as owners and builderslook for alternatives to conventional wood frame systems. These stay-in-place forms tout many advantages over wood frame, concrete and masonrysystems.

ICFs can be separated into two major categories: the shape of the form itselfand the shape of the concrete within the walls. The units are shaped inpanel, plank and block forms.

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Panel forms usually come in 4' X 8' sizes; planks are normally 1' X 8'; anda common size for the block unit is 16" X 4'. The forms usually have teethor grooves along the edges that connect the pieces together.

The other category is the shape of the concrete within the walls. Theseshapes come in a Flat, Grid or Post and Beam shape.

The Flatversion isshaped like aconventionalflat concreteslab.

The Grid form comes in two versions:

An uninterrupted or waffle grid that hasthinner concrete between thicker horizontaland vertical ribs;

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And an interrupted or screen grid with noconcrete connecting the thick horizontal andvertical ribs.

Post and Beam systems produce spaced concretemembers.

A typical unit is made up of two expanded polystyrene (EPS) face shells,connected by EPS, rigid plastic, or steel. The plastic or steel connectors areembedded in the face shell (recessed for smoothness), providing fasteningsurfaces or furring strips for attaching interior and exterior finishes.

Some ICF manufacturers produce special units for corners, roundedcorners, arches and lintels.

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AdvantagesEven Temperatures - ICF walls have 3-5 times the thermal mass ofconventional wood frame walls so the temperature of the building tendsto be stable providing more comfort.

Fewer Drafts - Air changes per hour have been measured at 0.5 forconventional wood frame walls and 0.11 for ICF walls. This translatesinto less air infiltration for ICF walls.

Consistent Floor to Ceiling Temperatures - ICF walls have a floor-to-ceiling differential of about 2-3 degrees. Differentials for conventionalwalls have been measured to be 2-3 times that much.

Sound Absorption - Measured Sound Transmission Coefficient (STC)for ICF walls range from the high 40's to the low 50's; compared to 36-38 for a conventional wood frame wall. This means the ICF wallallows two-thirds less sound transmission.

Energy Efficient - Studies show ICF homes use 43 percent less energyfor heating and 32 percent less for cooling. R-values vary for differentsystems within a range of R-17 to R-26. This means lower energy bills.

Strength - The strength of reinforced concrete in ICF walls makes themmore likely to withstand natural disasters than traditional wood framebuildings.

Durability - ICF walls require little or no maintenance. The concrete isresistant to rot, rust, burning, oxidation and pests.

Design Flexibility - Buildings can be designed like conventional homeswith traditional interior and exterior finishes. Curves and irregularangles can be produced very easily.

Ease of Construction - The lightweight ICF forms require littlemanpower to lift and less construction time to build.

Less Concrete - Since the forms stay in place, a conventional sizeconcrete wall can be built with less concrete.

No Additional Insulation Required - Forms stay in place and provideadequate insulation for the building.

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Environmental Concerns - The insulating material leads to less energyconsumption and costs.

Fire - The foam in ICFs is manufactured with fire retardant additives,which prevent the foam from burning. In fire-wall tests where an ICFwall was subjected to 2000 degree Farenheit temperatures andcontinuous gas flames, there was no structural damage to the ICF wall.Research concludes that foam emissions from fire are no more toxicthan wood emissions.

Codes - Some systems have been approved by all three major modelcodes. Builders should check with manufacturer and building officialsto ensure the particular system is acceptable in the jurisdiction.

Disadvantages

Costs - ICF homes cost about $2 a square foot more than conventionalwood frame homes. This added cost can be recouped in energy andmaintenance savings from using ICFs.

Pests - There have been no widespread reports of problems with insects,but foam makes a great nesting ground for some insects and there havebeen reports of foam core panels being infested. Some systems cometreated for pests.

Experienced Crews - ICFs are still relatively new and not all tradeworkers are familiar with them. This problem is solved as moresystems are used in construction.

Additional InformationContact the Insulating Concrete Form Association for a list of ICFproducers.1807 Glenview Road, Suite 203Glenview, IL 60025(847)657-9728e-mail: [email protected]: www.forms.org

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AMHOMEAmhome U.S.A., Inc.P.O. Box 1492Land O'Lakes, FL 34639 PH: (813) 996-4660; (800) 393-3626FAX: (813) 907-8565URL: www.amhomeusa.com

Amhome is a post-and-beam panel variety of ICF. The system is availableonly to licensed installers, who receive the tools and instructions to producethe forms themselves from foam stock. Starting with EPS board, installerscut vertical cylinders for posts and horizontal channels for beams. Theyalso cut vertical slots along one or both faces of the board every 16" oncenter and slide in wooden furring strips. The completed forms are placedvertically on the foundation and glued to the foundation as well as eachother (no formaldehydes are used in the adhesives). The furring strips serveas fastening surfaces. The installer can cut any of a variety of special-purpose units. The full system includes a high-R roof design and specialventilation equipment. It is possible to build an Amhome with a traditionalroofing system, but this is not recommended by the manufacturer.

Individuals may purchase the Amhome kit which necessitates an Amhomecrew to cut, assemble, erect and "dry-in" the structure at your location. Inmost cases Amhome will indicate a building crew that has been speciallytrained for installation of the Amhome product. Under certain conditions,Amhome will provide a trained technician, paid by the hour, to assist theclient’s capable crew.

Lastly, within the local areas of Florida counties (Manatee to Pasco andPolk), Amhome can arrange for a turnkey home building project thatincludes all aspects of the home. In most cases outside of the Florida area,Amhome provides the building materials and crew to construct theAmhome portion of the house. This leads the home buyer to work with acontractor in his/her area that can provide the non-Amhome parts such asthe foundation, plumbing and finishing stages.

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Product InformationWalls - Walls are engineered to bear the design load without factoring inthe EPS or any finishes. The column reinforcing rods extend down into thefoundation to anchor the frame. A 2" X 10" top plate is fastened 48" oncenter with anchor bolts to the concrete tie beam. The top tie beam runscontinuously on the top of the wall. All exterior walls are solid 9 3/8" EPS(Expanded Polystyrene) which insulates the inside from outside noise andvice versa. The exterior walls have a rated value of R-40.

Roofing

The 12" thick roof isconventionally framed withlaminated wooden I-beams andlaminated wood ridge beams.Rigid EPS panels are tightlyinserted into the web of thewooden I-beams and coveredwith radiant foil to deflect heat.A continuous ridge ventexhausts roof heat. The roof

system is rated R-50.

Doors and Windows - Extruded vinyl window frames with double hungthermal windows resists heat transfer. Additional protection from the sun isgiven by easily removable sun screens. Steel doors are insulated with foamcore and close tightly to magnetic strips.

Ventilation - A whole house fan exhausts 4200 CFM’s of air, replacing oldair with new air. A special electrostatic air filter cleans the air ofmicroscopic allergy causing material as it is circulated through the house.

InstallationProcedure - The construction of the exterior walls begins by using rigid,10" thick, 4' X 8' EPS blocks. The blocks are stood on end and each blockis joined to an adjacent one and the slab with adhesive for an airtight,watertight joint. The top of each block has a 6" X 10" deep cavity runningthe width of the block. This is the form for the bond beam.

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Column cavities are 6" diametercuts in the vertical length of theblock and are spaced 8' on center.The columns are poured on eitherside of window and door openings.Embedded steel rebar, projectingfrom the slab, serve as dowels.These are tied to vertical rebarrunning the height of the columncavity. 5000 psi concrete is thenpumped into the cavities forming amonolithic post-and-beam skeleton.

The roof construction involves fabricated wood I-beams connected 24" oncenter to the 2" X 10" pressure-treated top plate bolted to the bond beam.The I-beams are attached to a laminated wood ridge beam with steelstrapping. Ten inch thick EPS panels, covered with reflective foil on thetopside, are tightly inserted between each pair of adjacent beams. The foilprovides a moisture and radiant heat barrier. The roof deck is attached,followed by conventional underlayment and shingle roofing. There is a 2"clearance between the top of the EPS panel and the roof decking. Thisspace allows ventilation between the ventilated soffit and a continuous ridgevent for increased energy efficiency.

CostsAn AMHOME building placed on an existing slab runs an average of $17-$20 per sq. ft. This cost includes a framed interior ready for electricity andplumbing, exterior ready for desired finish and a roof ready for shingles.Price is affected by the desired types of windows and doors; and whetherthe building has an upstairs or loft area.


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ECO-BLOCK

Eco Block, LLCPO Box 14814Ft. Lauderdale, FL 33302PH: (954) 766-2900FAX: (954) 761-3133URL: www.eco-block.com

ECO-Block 2000 is a flat block that arrives disassembled for easy shippingand storage. The face shells have several embedded plastic connectors onone side. Rigid plastic ties slide into the connectors of two face shells tocreate the assembled block.

Product InformationThe two face shells of Eco-Block 2000 measure 16 inches high by 48 incheslong. They are 2.5 inches thick and made of expanded polystyrene. Theirupper and lower edges have teeth for interconnecting adjacent blocks. Theties come in various lengths to create concrete thicknesses of approximately4", 6" or 8" and have notches to hold rebar. The connectors are recessedslightly beneath the foam, and also have a long surface for fastening tofinish materials.

Concrete is poured into thecavities created by connectingthe two EPS shells together.After the concrete cures, theECO-Block sidepanels remain inplace and provide the insulationfor the building.

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ECO-BlockTM 2000 DIMENSIONS AND CHARACTERISTICS

4 Inch Block 6 Inch Block 8 Inch Block

Block 48 x 16 x 9 48 x 16 x 11 48 x 16 x 13 Dimensions (Standard (1219 x 406 (1219 x 406 (1219 x 406 Block) x 229 mm) x 279 mm) x 330 mm)

Concrete 4 inches 6 inches 8 inches Thickness (102 mm) (152 mm) (203 mm)

Concrete Volume 0.07 yd3 0.10 yd3 0.13 yd3

per block (0.05m3) (0.07 m3) (0.1 m3)

EPS Thickness 5 inches 5 inches 5 inches (total) (127 mm) (127 mm) (127 mm)

Wall Surface 5.3 ft2 5.3 ft2 5.3 ft2

Area per block (0.5 m2) (0.5 m2) (0.5 m2)

Fire Rating* 2 hours 3 hours 4 hours

Sound 42 dB 53 dB 60 dB Insulation*

Thermal R-22 R-22 R-22 Insulation*

Block Long side: Long side: Long side: Dimensions (90º 32 inches 32 inches 32 inches Corner) (813 mm) (813 mm) (813 mm)

InstallationThe blocks are assembled as a two-sided form on the jobsite. The forms arestacked together with vertical and horizontal rebar in the cavities. Concreteis pumped into the cavities forming a concrete wall with flat inner and outerfaces.

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Tilt-up Walls - Using one side panel, tilt-up walls can be constructed thathave insulation and furring on one side with no additional work. Concreteis poured into an assembled side of Eco-Block 2000. When the concretecures, the whole side is lifted up forming a tilt-up wall.

Using "connector splices", footings up to 24" can be easily constructed.Radius walls and angled walls (other than 90 degrees) can also beconstructed with ease using simple mitering techniques.

Utility lines and piping are embedded in the thickness of the foam.



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INSULFORM1 Golf Villa DriveDaytona Beach, FL 32124PH: 904-304-3152FAX: 904-760-8231URL: www.insulform.com

Insulform EPS is one of several screen-grid ICF block types. INSULFORMconcrete wall form units are intended as permanent modular formwork foruse in the construction of insulated reinforced concrete walls andcomponents including: grade beams, piers, retaining walls, basement walls,bearing and non-bearing exterior and interior walls, sound barrier walls,fences and landscape walls.

Product InformationManufacturer claims Insulform to be lowest-priced ICF on the market.Insulform is a United States E.P.A. "Energy Star®" product. Results ofindependent engineering analysis show the thermal mass performance isequivalent to an R-value in excess of R-50. It reduces infiltration of outsideair which eliminates mildew, mold, and dust. Smaller HVAC size reducesmonthly utility costs by 50% or more as well as initial HVAC installationcosts. Insulation formed, steel reinforced, poured concrete wall system israted at 110 m.p.h. to 140 m.p.h. wind load, per local building coderequirement. It is fire, insect and moisture resistant. There is no lostinterior floor space, no special foundation block required, no oversized dooror window jambs required. An 8" I.C.F. form width is equal to 8" concreteblock width. Wood or steel furring of interior walls is user friendly toother sub-contractor trades, especially electricians, plumbers and dry wallinstallers. Insulform is environmentally friendly with recyclable waste.

Block - Insulform blocks are 48 inches long, 12 inches high and 8 incheswide. Each block has two opposing faces of expanded polystyrene (EPS)approximately 1.75 inches thick. The void created by these faces is filledwith concrete and the required reinforcing steel. Each form unit is equal tofour square feet of wall area.

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INSULFORM has an 8-inch overall thickness. The opposing faces areconnected with five integral 5-inch tall by 2-inch thick EPS webs and twointegral 5-inch by 1-inch end pieces. End blocks, which have a solid EPS-filled end 12-inch high by 1-inch thick, are used to close the form ends atcorner installations.

InstallationWalls are assembled by stacking and interlocking the blocks. Vertical jointsare required to be staggered horizontally in 24-inch increments in a runningbond pattern. Horizontal form edges are held together by a series of 8"modular interlocking teeth. The system is also designed to interlock at90-degree angles. Mitering the blocks and securing the blocks to a wood ormetal form creates curved or angled walls.

Vertical and horizontal steel re-bar reinforcement is centered in the cores.Re-bar is required to be adequately supported and secured againstdisplacement prior to placing of concrete. Vertical reinforcement is securedto the slab by re-bar placed in the footing. Lap splices are provided inaccordance with local code requirements, but in no case shall they be lessthan 24 inches. Reinforcement over the windows and doors shall conformto the approved engineered plans and accompanying beam schedule for re-bar reinforcement and placement.

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The first course of forms should be laid to a snapped chalk line and thenadhered to the slab/footer by foam adhesive to prevent movement of theform during erection and when placing concrete. Electrical and plumbinglines can be placed in the thickness of the EPS.

Installed wall forms will top out at a bearing height of one foot per courseplus 3/4" (an eight course wall will have a finished bearing height of 8'-3/4").

Window and door opening bucks can be made of wood, metal or vinylextrusions. Sufficient cross bracing and shoring must be installed at allopenings to assure that the openings maintain the desired shape and sizeduring the placement of concrete. Minimum lumber size shoring materialshall be 2" x 6" with 2" x 8" lumber preferred. Preferred bucking materialis 2" x 8" metal stud track or U-bucks.

CostInsulform retails for about $8 per four sq.-ft.-block. This price does notinclude rebar, labor and concrete. The price for a vertical wall is about $4-$5/ft (with rebar, concrete and labor included).

DeliveryIt typically takes about a week to get an order delivered after the order hasbeen placed with the manufacturer.

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SteelSystems

Steel housing components are being manufactured to reflect steel's superiorstrength and performance. Cold-formed steel is light-weight, easy tohandle, cost effective and a quality alternative to traditional framingmaterials. Steel, as a framing member, is becoming more popular asconcerns over environmental consequences, termites and decay discourageinterest in wood framing. The non-combustibility of steel has alsogenerated interest among urban areas and fire hazard districts.

Steel framing is manufactured by a cold-forming process in which strips ofsteel sheets are put through a series of roll forming dies that form the sheetinto desired lengths, widths, thicknesses and shapes. The basis of cold-formed sheet steel design is that its strength comes from the material andhow it is shaped. When a sheet is formed into a "C' shape, the bends act asstiffeners and increase the strength of the sheet many times over. Becausemost of the strength and stiffness of the section depends on the shape andnot its thickness, strength to weight ratios can be very favorable.

ComponentsSteel framing components are available in a variety of different shapessuitable for certain uses.

Structural "C" - The "C" is the predominant shape used for floorjoists, wall studs, roof rafters and ceiling joists. Standard dimensionsare nearly identical to those of dimension lumber, with flange widthsabout 1-1/2 inches and web depths that range from 2 to 12 inches.Structural “C” is available in Gauges 12 – 22.

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Studs used in typical load-bearing applications are16 to 20 gauge. The "C" is available both pre-punched and unpunched.

Track (Channel) - Track is commonly used forrim joists, top and bottom plates and blocking. Itis normally specified in the same gauge as theframing material with which it is used. Track isalso available pre-punched and unpunched.

Angle - Angle can be used as a ledgeror a connection bracket for stiffening,bracing or blocking.

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Cold Rolled and Hat Channel - Similarin shape and gauge to track, the smallersized channel is used for stiffening,bracing and blocking as well as furring.

Cold Rolled Zee - The Zee can be used instructural applications as a roof purlin or inlighter gauges for furring.

Steel framing construction is usually similar to wood framing construction.However, some steel assemblies utilize innovative systems that spacemembers up to eight feet on center using horizontal furring channels at 24inches on center to tie the system together. Steel members are commonlyspaced 24 inches on center. Most steel framing falls into one of threecategories: Stick- Built construction, Panelized and Pre-Engineered systems.

Stick-Built Construction - Stick built construction is virtually the same inwood and steel. This framing method actually uses many of the techniquesassociated with panelized construction. The steel materials are delivered tothe job site in stock lengths or in some cases, cut to order. The layout andassembly of steel framing is the same as the methods for lumber with oneexception; the components are screwed together rather than nailed. Steeljoists can be ordered in lengths sufficient to span the width of a home.This expedites the framing process and eliminates lap joints. Sheathingand finish materials are fastened with screws or pneumatic pins.Panelized Systems - Panelization consists of a system for pre-fabricatingwalls, floors, and/or roof components into sections. This method ofconstruction is most efficient where there is a repetition of panel types and

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dimensions. Panels can be made in the shop or in the field. A jig isdeveloped for each type of panel. Steel studs and joists are ordered cut tolength for most panel work. They are then placed in the jig and fastenedby either screws or welding. The exterior sheathing, or in some cases thecomplete exterior finish, is applied to the panel prior to erection. A majorbenefit of panelized systems is the speed of erection. A job can usually beframed in about one quarter the required time to stick build. Whenconsidering that the exterior finish may also be part of the panel, theoverall time savings may be even greater.

Pre-Engineered Systems - Steel's high strength and design flexibility allowinnovations not possible with other materials. Engineered systemstypically space the primary load-carrying members more than 24 inches oncenter, sometimes up to eight feet. These systems either use secondaryhorizontal members to distribute wind loads to the columns or lighterweight steel fill-in studs between the columns. Furring channels used tosupport sheathing materials also provide a break in the heat flow path tothe exterior, which increases thermal efficiency. Many of the pre-engineered systems provide framing members that are pre-cut to lengthwith pre-drilled holes for bolts or screws. Most of the fabrication labor isdone by the supplier, allowing a home to be framed in as little as one day.

AdvantagesNon-Combustible - Steel is non-combustible, which may result in lowerinsurance premiums for the home buyer.Durability - Steel is not susceptible to rot or termites. It does notshrink, warp or swell. Galvanized steel resists corrosion.Consistent Quality - Galvanized steel studs are manufactured in thequality-controlled setting of the factory. Pre-punching studs providesconsistent cut-outs for electrical and plumbing lines.Supply/Pricing Stability - Because the steel manufacturing industry canrely on a relatively stable resource base, it does not experience the pricevolatility that is characteristic of the lumber market.Strength - Steel framing manufacturers suggest that steel's highstrength-to-weight ratio, combined with the use of framing screws thatresist uplifting loads more effectively than nails, produces a structurethat performs better than conventional wood construction duringearthquakes and hurricanes.Recyclability - All steel products are 100 percent recyclable. Steelframing products are made with recycled steel and contain at least 25

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percent recycled material. Some products consist of 100 percentrecycled material.Size Availability - Framing members are available in a variety of pre-cut standard shapes and sizes, as well as custom shapes and sizes;minimizing construction waste.Weight - Steel members weigh as much as 60 percent less than woodmembers so foundation and even seismic loads can be reduced.

DisadvantagesLack of Familiarity - Building officials, engineers and architects needto be educated about steel framing systems' capabilities as they apply toresidential construction. The work force needs to be familiarized withsteel framing systems as well.Thermal Performance - Because thermal bridging is increased by thehigh thermal conductivity of steel, questions regarding the thermalperformance of steel-framed houses remain unanswered. CABO's 1989Model Energy Code shows that the conductivity of a wall framed withsteel is up to 110 percent higher than that of a comparable wall framedwith wood.

Additional InformationContact the North American Steel Framing Alliance for a list of light-gauge steel framing materials and manufacturers.1726 M Street, NWSuite 601Washington, DC 20036(202) 785-2022e-mail: [email protected]: www.SteelFramingAlliance.com

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StructuralInsulatedPanels

Structural Insulated Panels (SIPs) are engineered building componentsmade by joining high performance rigid insulation to oriented strandboard, waferboard or plywood. The core, which is lightweight butrelatively thick low density, is made of either expanded polystyrene,extruded polystyrene or rigid polyurethane. They are used as floors, wallsand roofs for all kinds of buildings. In SIPs, insulation is a component ofthe system and that improves thermal efficiency. Panels can be ordered ineither a pre-engineered whole house package or in panels the builder cutsto desired dimensions on the jobsite.

Standard panels are 8' X 4'. Wall panels are available in 3-1/2", 5-1/2" and7-1/4" thickness. Roof panels come in either 9-1/4" or 11-1/4" thickness.

AdvantagesThermal Performance - A major advantage of foam core panel systemsis their enhanced energy efficiency. Roof panels generally have evenhigher R-values due to their additional thickness. Since most panelsincorporate little solid framing, panel systems are gap-free, so heat lossthrough thermal bridging is significantly reduced.Speed of Construction - With the use of large pre-fabricated panels,manufacturers claim that houses can be enclosed in a few days.Strength - When subject to loading, SIPs perform much like an I-beam.The skins act as flanges and resist tension and compression, while thecore acts as a web, resisting shear and preventing the wrinkling of theskins.Moisture Migration - Because the insulating materials used in thepanel's core have inherent vapor-retarding characteristics, an additionalvapor retarder is not typically required. In fact, depending on thethickness and density of the core, most urethanes and some polystyrenes

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have a perm rating of less than 1, which technically qualifies the panelas a vapor retarder.Comparable Costs - SIPs generally cost about the same as otherbuilding materials. Not having job-site waste can save considerably inlandfill fees. Labor savings, faster dry-in time and better drywallutilization also contribute to lower costs of SIPs.Environmental Impact - Since SIPs are factory-produced, there is lessjob-site waste, which means less trash for the landfills. They are alsoenergy efficient so they save fossil fuel consumption. The skins use fast-growth harvested farm trees rather than old growth forests. SIPbuildings use 35% less raw timber and have lower embodied energy.

DisadvantagesRoof Shingles Overheating - Shingles on SIP roofs tend to overheat sosome shingle manufacturers do not provide a full-term guarantee if theyare installed on structural sandwich panels. Some roof SIPs aremanufactured with built-in air flow channel to ensure shingle durability.Trade Interaction - Foam panels pose a learning curve for certaintradepersons. Manufacturer participation in early phases of design caneliminate many problems associated with the installation of mechanicalsystems.Insects - Much like conventional framing members, foam core panelsare susceptible to carpenter ant and termite infestations. Even thoughthere is less wood to be eaten, tunneling in the foam can reduceinsulation values and structural integrity. In addition to suggestingstandard preventive practices, some manufacturers incorporate insectrepellent treatments into the manufacturing process.Lack of Familiarity - The inherent skepticism of using a product that isnew can inhibit its use.

Additional InformationContact the Structural Insulated Panel Association for a list of panelproducers.3413 56th Street NW, Suite AGig Harbor, WA 98335(253)858-7472e-mail: [email protected]: www.sips.org

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R-CONTROLAllied Foam Products, Inc.1604 Athens Hwy.P.O. Box 2861Gainesville, GA 30503PH:800/533-2613 770/ 536-7900url:members.aol.com/AlliedFoam/rcontrol.htmle-mail: [email protected]

R-Control Structural Insulated Panels are fabricated from PerformGuardExpanded Polystyrene (EPS) laminated to oriented strand board to form astructural panel that is strong enough to withstand wind, snow and seismicloads. The rigid EPS core blocks wind and moisture resulting in an energyefficient design. The panels have been recognized by all the major codes.

Product InformationThe SIPs are delivered according to provided specifications and ready forinstallation. They can be pre-cut minimizing on-site preparation and waste.R-Control panels are available in a variety of sizes from 4' X 8' up to 8' X24'. Panels over eight feet in length are made to an 8' maximum width.The system can be used for exterior walls, ceilings, floors and roofs.Utility chases can be pre-cut into the core at the factory. Conventionalframing methods can be substituted or incorporated for some buildingcomponents. Floors and interior walls, for example, can be framed withconventional joists, especially where they do not need to be insulated.

Different thicknesses of panels have different R-values at different design temperatures.

Wall Panels - Wall panels are available in 4' X8' sizes or complete wall sections. Standard

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thicknesses are 4-1/2", 6-1/2", 8-1/4" and 10-1/4". Foam panelconstruction is compatible with either a platform or balloon frame system.With balloon framing, the lower wall panel bears directly on the sill plate,and the second level floor framing hangs from the top plate of thepreceding floor's wall panels. This method offers better thermalperformance by keeping the insulation uninterrupted.

Roof Panels - Roof panels are installed in a manner similar to wall panels,with the same joint conditions. If roof panels have deep enough sectionsand load conditions allow, panels can span the distance from the ridge beamto the exterior walls. Roof panels typically span up to 12 feet.

InstallationTools and Accessories

The complete system has specialty fasteners,adhesives, sealants, engineered I-Beams andheaders. R-Control panels are connected usingnails or staples (screws of equal strength may besubstituted at equal frequency) and Do-All-Ply.R-Control Do-All-Ply is a bonding adhesive usedwith all fastening techniques. The panels arejoined using splines and plates. Do-All-Ply isapplied in 1/4" X 1/8" beads to wood surfaces.This results in optimum coating when the platesand splines are installed.

ProcedureA crane or lift truck may be required for some installations. The panels fiton solid wood plates that are set in place on the foundation, floor slab orframed subfloor. Some type of winch-and-strap system is often helpful toensure that panel edges are butted tightly against each other. A router andspecial bits may be required to cut openings in panels. To place the wallpanels, the foam core at the bottom of the panel is routed to allow bothfacings to slip down over the bottom plate.

The second panel is set over the bottom plate in the same manner and slidinto place next to the first. Connecting splines are inserted, caulked, andfastened. The remaining walls are placed in similar fashion. Roughopenings for doors and windows can be cut on site with a circular saw orchain saw, although pre-cut door and window openings can be provided.

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Structural headers are installed as required. Roofing and siding materialsare conventionally applied to the exterior face. Interior and exteriorfinishing applications are simplified by the continuous nailing surface.

Foam around the perimeter of rough openings is typically routed back to adepth of 1-1/2 inches to let in 2" X 4" framing. Solid plates are usedaround windows, doors, top and bottom plates and panel cornerconnections. This provides continuous support, strength, easy attachmentand a snug fit.



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Tilt-UpConcretePanelsTilt-up construction, as a method, can be traced to Roman times. The termwas coined in the 1940's to describe a method for constructing concretewalls rapidly and economically without the formwork necessary for poured-in-place walls. Tilt-up construction is comprised of two steps; slabs ofconcrete that will make up the wall section are cast on site or in a factory.When they attain the proper strength, they are raised with a crane and set onprepared foundations. There is little formwork since only perimeter formsare required to hold the panels in place. Once erected, the panels aretemporarily braced, connected and caulked at the joints. The roof structureis then attached to the walls to complete the building. Fifteen percent of alltilt-up construction in the country takes place in Florida.

AdvantagesEconomical - With a trained crane and rigging crew, tilt-upconstruction has been proven to be more economical than other methodsof construction for the same type of buildings.Speed of Construction - It takes about 4-5 weeks to form and place thepanels once the slab is complete.Durability - Tilt-up buildings constructed in the 1940's show little signof aging.Fire Resistance - Concrete as a material is extremely fire-resistant. A6- 1/2" wall has a four-hour fire rating.Low Maintenance Costs - Only maintenance required is a new coat ofpaint every 6-8 years.Low Energy Costs - Insulation values for tilt-up concrete often exceedsvalues for masonry and wood frame.

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Expandability - By planning for the possibility of expansion, panelconnections can be designed so the panels can be detached andrelocated.

DisadvantagesCrane Requirement - A crane is required to lift the panels into place.This represents equipment cost not needed for other types ofconstruction. The job site needs enough space for crane set-up.Lack of Familiarity - The inherent skepticism of using a product that isnew can inhibit its use.Crew Training - A trained crew is needed to set-up panels. It willinitially take a newly-trained crew a longer time to do the job.

Additional InformationContact the Tilt-Up Concrete Association for a list of manufacturers.PO Box 204Mt. Vernon, IA 52314(319) 895-6911E-mail: [email protected]: www.tilt-up.org

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Royall Wall801 Pike RoadWest Palm Beach, FL 33411PH: 1-877-769-2551 (561) 689-5398FAX : (561) 689-0407url: www.royallwall.come-mail: [email protected]

Royall Wall is an engineered tilt-up concrete wall system used forresidential and commercial construction. It is an integration of concrete,steel and polystyrene insulation panels. The panels are pre-formed andassembled at the manufacturing site. They are pre-engineered to thedesigner's specifications and transported to the job site to be installed bypre-qualified and professional installers. The panels come with a 10-yearstructural warranty.

Product Information

Royall Wall systems are available in a "Standard" panel and a heavier-reinforced "Plus" panel designed for higher wind resistance. A Royall"Firewall" for more demanding fire-resistant design is also available. The

systems' components of reinforcement rods, meshand high-density concrete (which frequently attains6000+ psi) make the panels extremely strong. Thereare few joints and separate components resulting in asolid construction. This feature also translates intofewer openings for termites and other insects.

The standard 8" wall achieves 140-mph wind resistance. The strongerRoyall Wall "Plus" panels are rated at 260-mph. The system has been testedto withstand 85-mph missile impact. Each Royall Wall home is custom-engineered according to design specifications and not pre-fabricated.The polystyrene component provides insulation, and consequently energyefficiency, low sound transmission and fire resistance.

InstallationProcedureTo install the Royall Wall system, the exterior slab edge has to be formed toprovide a 1-1/2" X 6" recess. The recess must be kept clear of anyelectrical and plumbing lines. No steel reinforcement can be placed within

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7" of the recess to allow the placement of Royall Wall anchors. The stuccosub-contractor has to install wire lath at the panel and foundationintersection. Once a panel is set in place, it is braced until the structure iscomplete.

Trusses are strapped to cast-in structural channels at the top of the panels.Through-wall sleeves are provided to allow ledger installation withthrough- wall bolts. The manufacturer recommends the head bolts exposedon the exterior be painted with fiber glass resin for long term protection.Vertical joints are insulated with expanding foam. Intersecting interiorwalls are connected by a typical L metal connection installed by thebuilder's framing sub-contractor.

Electrical raceways are installed as follows bythe manufacturer: (a) the foam raceway strip isremoved by the electrician (b) Romex is fedthrough the conduit sleeves (c) Romex isplaced in the raceways (d) the electrical box isinstalled and connected (e)electrician replacesthe foam strip and injects expanding foamaround the box after inspection.

It is the builder's responsibility to install pressure-treated bevel-edge woodbucks in all windows. After builder installs the window, the metal framingsub-contractor applies "L" metal (Roof Drip Edge Metal) at the insidecorner of the window. Royall Wall will provide cast-in pressure treatedwood rough bucks in all door openings only.

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Documents

ALTERNATIVE RESIDENTIAL CONSTRUCTION SYSTEMS