State Board Policy

DESCRIPTOR TERM: Relocatable Classrooms
CODE: 6009
ADOPTION DATE: January 12, 1966
REVISION: June 22, 1990

Minimum Specifications For Relocatable Classrooms


A. To set minimum safety and utility requirements for relocatable units regardless of the manufacturer, vendor, and/or contractor.

B. To assure local school authorities a relocatable unit meeting the mentioned requirements and, at the same time, giving them the freedom of selection as to the particular make and model of relocatable unit they desire to place under contract.

C. To set forth certain minimum mandatory requirements that must be complied with by any manufacturer, vendor, and/or contractor supplying a relocatable unit for use in the Public School Districts of the State of Mississippi.

D. All relocatable units must conform to the construction requirements as established in this specification.


A. Approval of plans and specifications.

1. Plans shall be prepared by an Architect or Engineer registered in the State of Mississippi. 2. Submit plans for approval to State Agencies listed below before bids may be submitted to local school districts:

a. State Board of Health - 1 set
b. State Department of Education - Division of School Building and Transportation - 1 setMOBILITY

A. To be considered a relocatable unit, the largest component must be of such construction as to permit highway travel and require a minimum of "on-site" work before the unit may be used for intended school work before the unit may be used for intended school purposes. Such units must consist of prefabricated component parts, or sections, that can be easily joined together or dismantled on the site.

B. A minimum of dismantling work and replacement of parts or components should be required to prepare an "in place" unit for relocation to another school site.


A. The following dimensions must equal or exceed the minimum shown below:

1. Floor to ceiling -- 8' - 0"
2. Exterior width -- 24' or 28'
3. Clear instructional area -- 700 square feet, exclusive of storage, toilets, and heating area.

STRUCTURAL DESIGN A. Southern Standard Building Code - Coastal Region (latest edition)

1. All units for the State of Mississippi shall meet code for specified region regardless of site location.

2. Foundations, as well as structure, shall meet code .

a. Footings shall be "poured in place" concrete. Piers shall be of concrete and/or masonry construction, using 4' jr. steel I beam for posts and rails as runners for units to be placed on, reinforced as required. Slab on grade construction will not be allowed. Concrete blocks and piers will not be allowed.

B. Anchor bolts shall be used to resist uplift.

C. Floor Live Load 75 pounds per square foot.

D. Certification of Design.

1. To be approved by the State Department of Education, Division of School Building and Transportation. Structural drawings must bear the seal of a structural engineer registered in the State of Mississippi.CHASSIS

A. Shall be perimeter in type and design.

B. All I-Beams are made of A-36 steel or better.

C. Either 8' or 10' I-Beam will be used as chassis beams. The front and rear members will be the same depth of I-Beam as those used on he sides. The I-Beam will be checked to see if it corresponds with the size specified.

D. Placement of axles shall be indicated on the chassis drawing. This placement is expressed on the drawing as a distance the axles are located from the front crossmember. The axle location has been determined by engineering analysis, taking into account the gross weight, total length, the necessary coupling hitch weight, total distance, and turning radius. The coupling weight is not less than 12% nor more than 255 of the gross weight. The axles, rims, tires, and hitch will remain the property of the manufacturer.

E. Weld Quality - All welds on the steel chassis are full welds with no burn throughs or skips. Where the main I-Beams are butted together the joint is either full penetration weld from both sides of the web and flanges, or it is welded on one side of the web reinforced on he other side of the web of the I-Beam. This plate is at least 4" wide and is welded along all four sides. The difference in the height of the plate and web of the I-Beam is not more than 1½ inches.

G. Lag Bolt Spacing -- At least one lag bolt for every 40 sq. ft. of floor area will be used to fasten the chassis to the floor system. One lag bolt will always be installed at 4' intervals. The remaining required lag bolts will be evenly distributed throughout the rest of the chassis area. The lag bolt size is 5/16" x 2½".

H. A serial number will be stamped into each frame to identify the manufacturer, time, and place of manufacture.


A. Required:

1. All wall framing shall be 2x4 wood studs @ 16'' O.C. Double studs at and over all doors with extra blocking over and under all windows. Three 1/4 belt line running full length and width of building.

 2. A 3½" blanket of fiber glass insulation with a vapor barrier in all exterior walls. Insulation factor R-11 or greater.

3. Exterior walls shall be covered with embossed finish .019 aluminum, ribbed for extra strength. As an alternate exterior hardboard siding products as Tecture - 1-11 or masonite painted board siding or approved equal, will be acceptable.

4. Interior wall surfaces shall be 5/16" gypsum board with a ½ hour fire rating with a vinyl covered material.

5. Top Plate - Double 2x4's.

6. Bottom Plate - Single 2x4

7. Roof Rafters - Shall be full truss type 2x pitched rafters @ 16" O.C.

8. Roof is insulated w/3½" blanket fiber glass insulation with a vapor barrier on the warm side. Insulation factor R-11 or greater.

9. Interior ceiling shall be ½" gypsum board, carrying a ½" hour fire rating.

10. Roof covering shall be ½" CD plywood decking with 15# felt and 235# shingles or approved equal. Roof shall be vented.

11. Floor joists shall be 2X6 #2SPF @ 16" O.C.

12. Floor decking shall be ¾" plywood. ¾" T&G (Tongue and Groove) will be acceptable.

13. Floor shall be insulated w/3½" blanket fiber glass insulation with a vapor barrier on the warm side. Insulation factor R-11 or greater.

14. Finish flooring shall be 1/8" vinyl composition tile having a light reflectance value of 30%.

15. The bottom board material, which is fastened to the underside to the unit, is made of a moisture and weather resistant material.

16. This unit shall have two (2) exterior doors which are located remotely from each other. These doors shall not be located in rooms where an unlockable interior door must be used in order to exit. All exterior doors shall be aluminum clad, with shatter proof glass, panic hardware, door closure, and kickplate. There shall be one exit light located above each exterior door. All exterior doors swing outward. All exterior doors 36" x 80". There will be an exterior light located near each exterior door on the latch side of the door.

17. The window area shall equal at least 20% of the floor area and shall be at least 50% operable.

18. Interior doors to be 3" -0" x 6" -8" hollow core with heavy duty hinges.

19. Venetian blinds shall be furnished on each window of commercial grade.

20. Each girls' bath facility shall consist of one vitreous china water closet, one vitreous china wall hung lavatory. Wall materials are to have a smooth finish wall panel that is completely washable. A urine proof smooth trim will be metal. Toilet paper holder at each water closet and mirror over each lavatory.

21. Each boys' bath facility consists of one vitreous china water closet, one vitreous china wall hung lavatory, one vitreous china urinal wall hung with flush valve. Wall materials are to have a smooth finish wall panel that is completely washable. Trim will be metal. Toilet paper holder at each water closet and mirror over each lavatory.

22. Each kindergarten classroom required to have a 6-gallon hot water heater.

23. Sanitation shall meet approval of the Mississippi State Board of Health.


A. Electrical current shall be single phase.

B. All minimum wiring size to be 12/2 copper romex with ground.

C. All lighting and ceiling vent fans shall be 110V.

D. Lighting shall not be less than 70 footcandles of light.

E. This building shall have one 200 AMP main breaker panel box.

F. Electrical material, services, appliances, fittings. and other equipment installed, intended for use in or attached to, the unit shall be listed by nationally recognized testing agencies and all national electrical codes.


A. Plumbing shall meet requirements of the Southern Standard Plumbing Code.


A. Heating shall be electric, thermostatically controlled, and shall be designed to maintain an inside temperature of 70 degrees F. with an outside low of 10 degrees Fahrenheit


A. Skirting shall be .019 aluminum using a 2x2 framing. The skirting will enclose the entire perimeter of building from base of unit to ground level. The 2x2 framing material shall be treated to resist termites and moisture.


Chalk and Tack Board
Each classroom shall contain 16 linear feet of chalkboard and 8 linear feet of cork or fiber tackboard. Teacher's Cabinet
Each classroom shall contain one teacher's cabinet with a hanging rod and storage shelves.

Shelf and Hook Strip
Each classroom shall contain a hat shelf with 35 coat hooks.


A. Plans shall include the following:

1. Perimeter Frame Plan drawn at scale not less than 1/8" = 1' -0". 2. Foundation Plan drawn at scale not less than 1/8" = 1' -0".

3. Floor Plan drawn at scale not less than 1/8" = 1" -0". This plan shall show all equipment, electrical lights, outlets, mechanical, etc., door and window schedules.

4. Typical Wall Section drawn at scale not less than 3/4" = 1' -0".

5. Anchoring systems shall be specified on detailed plans.

6. Mini-gutters shall be installed around the complete unit with metal slashing over exterior doors and windows.

CONTRACTOR RESPONSIBILITY Work required of party contracting with school officials for furnishing and installing one or more relocatable units:

A. Location of each unit on the school site according to direction of school officials and accord with the following:

Should not be placed where they could constrict width of required means ofegress from there or adjacent building.

Should maintain vehicular access and space for service vehicles. Spacing of units should comply with requirements of Table 600 of the Standard Building Code.

B. Hand excavation and fine grading for footings.

C. Construction of footings and piers for concrete and steel I beam foundations. (A crawl space of 18 inches minimum is required.) Back fill and hand rank area to be covered by unit.

D. Complete installation of each unit on foundation including:

1. Proper anchorage to foundation and/or tie-downs.
2. Installation of metal skirt. E. Stub-out of utility lines so they are easily accessible for permanent tie-in by school officials. F. Complete cleaning of interior and exterior of each unit. Clean site area adjacent to unit and leave grounds in neat condition and unit ready for occupancy.

A. Contractor and/or vendor shall guarantee all labor, materials, and equipment for a period of one year after final acceptance of units in contract.

B. furnish the contracting school authorities:

C. All guarantees or warranties furnished by the manufacturers of any equipment or components incorporated in the work of the contract. The standard guarantee or warranty of the manufacturer of the main structural unit -- before entering a contract, school officials should consider the terms of the warranty of the unit manufacturer as to time limitations, etc.


A. Do preliminary clearing and/or grading prior to arrival of relocatable unit contractor.

Regulations governing specifications, plans and purchase of relocatable classrooms as authorized by house bill 677, section 3, regular 1990 legislative session are as follows:

I. Minimum specifications for relocatable classrooms shall be approved by the State Board of Education.

II. The State Department of Education, Division of School Building and Transportation, shall approve or disapprove:

A. All plans for relocatable classrooms by persons, firms, corporations, or

B. Persons, firms, corporations, or associations before bids are submitted to the local school district.

III. The State Department of Education, Division of School Building and Transportation, shall approve the purchase of relocatable classrooms based on the following:

A. Compliance with all applicable state purchasing laws,

B. Certified Proof of Publication for bids for the purchase of relocatable

C. Complete tabulation of all bids,

D. Copy of lowest bid,

E. Copy of approved plans as bid by lowest bidder,

F. Copy of Certified Letter from the Manufacturer stating that no asbestos containing building materials were used in the manufacture of the relocatable classroom(s).

V. Approval for the purchase of relocatable classrooms must be granted by the State Department of Education, Division of School Building and Transportation, before the contract for purchase may be awarded . VI. All rules and regulations as stated above shall be applicable to the leasing of or the lease/purchase of relocatable classrooms.

VII. In situations where there occurs either a natural or man-made disaster , the State Department of Education, Division of School Building and Transportation, may forego the above stated rules and regulations in order to expedite the acquisition of relocatable classrooms by the local school district. However, the acquisition of such units shall at all times comply with all applicable state purchasing laws.

Mississippi Department of Education     P.O. Box 771     Jackson, MS 39205-0771     General Information: 601-359-3513

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