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ES&H
Manual Fire Protection Supplement |
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Chapter 2: Fire
Protection Design Review |
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Appendix 1: Relocatable Structure Policy and Worksheet |
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1.0
Purpose
This worksheet helps to
simplify the determination of where a portable structure can be located both
exterior and interior of a building on the Jefferson Lab site and the level of
protection required. The criteria presented in this worksheet is 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
·
Department
of Energy (DOE) Standard-1066-2016, Fire
Protection, Appendix C Relocatable
Structures
2.0
Exterior 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. |
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2.1
Location Considerations
2.1.1
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 |
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Points
of Consideration |
Office
Trailers |
Transportainer |
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Single
Unit 12 x 60 |
Dbl.
Wide 24 x 60 |
8 x
8 x 35 |
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Sides |
End |
Sides |
End |
Sides |
End |
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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 |
2.1.2
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; 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.
2.1.3
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.
2.1.4
Relocatable
structures cannot be placed over manholes, drains, valve boxes or any
underground equipment and utilities that would become inaccessible.
2.2
Installation Notes
2.2.1
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.
2.2.2
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.
2.2.3
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".
2.2.4
All of the anchor
straps must be connected to earth anchors with no slack.
2.2.5
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.
2.2.6
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.
2.2.7
Portable
heating appliances should not be permitted unless they are approved by the Fire
Marshal and are a listed or approved type.
2.3
Location Restrictions
2.3.1
Relocatable
structures should be placed so emergency vehicles can operate within 100 of
the structure.
2.3.2
Portable fire
extinguishers, listed by a nationally recognized independent testing agency,
should be provided for portable structures in accordance with NFPA 10.
3.0
Interior Relocatable
Structures (aka Clean Rooms)
The following conditions are required when a relocatable structure is to be installed in the interior of a building, regardless of use:
3.1 Permit Requirement
3.1.1 The JLab Fire Marshal must be notified of the intent and plans to place a permanent or semi-permanent room greater than 65 ft2 in service. The Fire Marshal will inspect the location, provide protection requirements for the room, assign a unique identifying number to the room and issue a permit. The permit shall be attached to the outside of the structure and renewed annually.
3.1.2 The owing division will be identified as: NP (Nuclear Physics), EN (Engineering), AO (Accelerator Operations) or FM (Facilities Management). Room numbering example: EEL-NP-01 (EEL building, Nuclear Physics, #).
3.2
Construction Materials
3.2.1
Vinyl membrane material must be POLYSIM 509
(Simplex Isolation Systems) or equal.
3.2.2
Flame spread rating (= or <10) and Smoke
Density (= or < 195) per ASTM E84-00A Standard
Method of Test For Surface Burning Characteristics of Building Materials.
3.2.3
Must pass NFPA-701-2004 Test Method 2 for Flame Propagation of Film.
3.2.4
Framing must be non-combustible.
3.3
Protection
Measures
Points
of Consideration |
Vinyl Sided
Rooms |
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Protective Features |
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Sprinkler |
Extinguisher |
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1. Rooms or tents less than or equal to 65 ft2 (on or off wheels) |
No |
No |
2. Rooms greater than 65 ft2, but
less than 130 ft2 |
No |
Yes |
3. Rooms equal to or greater
than 130 ft2 |
Yes |
Yes |
The size, location and
processes in the room will dictate the number of sprinklers required or other
protective measures that may be required by the Fire Marshal. |
3.4
Demobilization
Rooms that are no longer needed shall be demobilized and removed by the owning division. The material may be stored for future use or discarded. Under certain circumstances, a room may be left in-place with the prescribed protection intact for up to 90 days pending determinations for future use. However, the room shall not be used for storage of combustible materials.
4.0
Revision Summary
Periodic Review 01/03/19 No changes per TPOC
Revision 0.3 03/15/17 Added section entitled Interior Relocatable Structures
Periodic Review 06/02/16 No changes per TPOC
Revision 0.2 09/07/13 Updated reference to DOE Standard
Revision 0.1 04/15/11 Removed [skirt] of non-combustible material (metal) in 3.0 Installation Notes; skirting is required, but materials combustibility is not specified.
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ISSUING
AUTHORITY |
APPENDIX
AUTHOR |
APPROVAL
DATE |
REVIEW DATE |
REV. |
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Fire Protection Department |
01/03/19 |
01/03/22 |
0.3 |
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