ES&H Manual

Fire Protection Supplement

Chapter 2: 

Fire Protection Design Review

Appendix 1:

Portable Structure Relocation Worksheet

 

 

 

1.0          Purpose

 

This worksheet helps to simplify the determination of where a portable structure can be located on the Jefferson Lab site.  The criteria presented in this worksheet are taken from the following codes and standards:

 

·       (IBC) International Building Code,

·       National Fire Protection Association (NFPA) 80A Recommended Practice for Protection of Buildings for Exterior Fire Exposure, and

·       Department of Energy (DOE) Standard -1066-2012, Fire Protection, Appendix C Relocatable Structures.

 

Instructions:

 

1.     Complete all sections of this worksheet to the best of your knowledge. 

2.     Send the worksheet to Facilities Management for evaluation and underground utility investigation.


Sketch the buildings and fire hydrants that are near the site where you would like to locate your portable structure.  Include dimensions.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


2.0          Location Considerations

 

The following table shows the required separation distance, in feet, that must be available between the sides of the trailer that you are trying to locate and any other building structure, permanent or portable.  These clearances do not apply between portable structures within a group that do not violate numbers 2 and 3 in Table 1 below.  At corners, extrapolate the straight-line exclusion boundaries to form an “exclusion rectangle.”  If this creates a problem, contact Facilities Management.

 

Table 1: Clearance Requirements for Portable Structures

Points of Consideration

Office Trailers

Transportainer

 

Single Unit 12’ x 60’

Dbl. Wide 24’ x 60’

8’ x 8’ x 35’

Sides

End

Sides

End

Sides

End

1.      Install without fire suppression sprinklers

62’

30’

62’

40’

38’

21’

2.      Install with fire suppression sprinklers

15’

10’

15’

10’

10’

10’

3.      Minimum clearance to a fire hydrant

50’

50’

50’

50’

50’

50’

 

The maximum replacement value of the trailer and contents must not exceed $1 million.  (A double-wide 60-foot trailer costs about $30,000 new.  An 8' x 8' x 35' transportainer costs about $2,500 used.)  The maximum replacement value also applies to the total value of trailers and transportainers grouped together.

 

The maximum floor area of a group of trailers or transportainers must not exceed 7,200 ft2.

·       12' x 60' trailer has 720 ft2 of floor area.

·       24' x 60' trailer has 1,440 ft2 of floor area

·       8' x 8' x 35' transportainer has 280 ft2 of floor area.

 

Relocatable structures cannot be placed over manholes, drains, valve boxes or any underground equipment and utilities that would become inaccessible.

 

3.0          Installation Notes

 

·       The ground under the trailer must be built up with fill sand to be higher than the surrounding grade to prevent moisture damage to the trailer floor.

·       The trailer foundation must be double blocked with 16” x 16” piers five feet on centers.  The piers are to be set on undisturbed soil. The base block of each pier is to be 24" x 24".

·       All of the anchor straps must be connected to earth anchors with no slack.

·       A skirt must be installed continuously around the base of the each trailer. The skirt is to have at least one removable 30‑inch‑wide panel for access under the trailer. This access is to be located at the electrical panel conduit.

·       All relocatable structures should be marked with the number, symbol, or name for identification purposes. The marking system used should be permanent and consistent with the system currently used at the site.

·       Portable heating appliances should not be permitted unless they are approved by a cognizant Fire Protection Engineer and are a listed or approved type.

 

4.0          Location Restrictions

 

·       Relocatable structures should be placed so emergency vehicles can operate within 100’ of the structure.

·       Portable fire extinguishers, listed by a nationally recognized independent testing agency, should be provided for portable structures in accordance with NFPA 10.

 

5.0          Revision Summary

 

Revision 0.2  – 09/07/13 – 1.0 Purpose - Updated reference to DOE Standard in Purpose.

Revision 0.1  – 04/15/11 – 3.0 Installation Notes – Removed [skirt] “of non-combustible material (metal)…”  Skirting is required, but material’s combustibility is not specified.

 

ISSUING AUTHORITY

APPENDIX AUTHOR

APPROVAL DATE

REVIEW REQUIRED DATE

REV.

 

 

Fire Protection Dept

Tim Minga

09/25/09

09/17/16

0.2

 

This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 9/27/2013.