Adjustable rack for supporting firestop material in a through-penetration

• US 6,536,169 B2
• Filed: 06/01/2001
• Issued: 03/25/2003
• Est. Priority Date: 06/01/2001
• Status: Expired due to Fees

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Dykhoff, Michael G.
• Primary Examiner(s): Friedman, Carl D.
• Assistant Examiner(s): Glessner, Brian E.
• Application Number:
  US09/871,750
• Publication Number:
  US 20020178664A1
• Time in Patent Office: 662 Days
• Field of Search: 522/201, 522/205, 522/208, 522/32, 526/60, 527/421, 527/451.5, 527/451.6, 211/106, 211/175, 211/133.2, 211/133.5, 211/181.1, 248/49, 174/48
• US Class Current: 52/220.8
• CPC Class Codes: F16L 5/04 to form a firebreak device
• CPC Class Codes: H02G 3/22 Installations of cables or lines through walls, floors or ceilings, e.g. into buildings

Abstract

An adjustable support rack for supporting firestop material in a through-penetration includes a frame sized to fit within the through-penetration, at least one adjustable support member movably connected with the frame for supporting the firestop material, and an adjustable mounting mechanism connected with the frame for securing the frame within the through-penetration. A method of fire stopping the through-penetration using the adjustable support rack is also described.

Claims

1. An adjustable support rack for supporting firestop material in a through-penetration, comprising:

(a) a frame sized to fit within the through-penetration;

(b) at least one adjustable support member movably connected with said frame defining a generally planar support surface for supporting the firestop material; and

(c) an adjustable mounting mechanism connected with said frame for securing said frame within the through-penetration, said adjustable mounting mechanism extending in a direction parallel to said planar support surface and being movable beyond the periphery of said frame to engage the through-penetration.

2. An adjustable support rack as defined in claim 1 wherein each of said first and second side portions includes a guide rail containing a plurality of aligned notches for receiving ends of said support rods.

3. An adjustable support rack as defined in claim 1, wherein said support rack further comprises side extensions removably connected with each of said side portions, said side extensions extending outwardly in opposite directions from each of said side portions.

4. An adjustable support rack as defined in claim 1 wherein said support rack is formed of a material mechanically heat stable to a temperature of at least 1500°

F.

5. An adjustable support rack as defined in claim 4 wherein said heat stable material is 0.150 inch cold rule steel rod.

6. An adjustable support rack as defined in claim 1, wherein said support rack is formed of an electrically nonconductive material.

7. An adjustable support rack as defined in claim 6, wherein said electrically nonconductive material is a ceramic material.

8. An adjustable support rack as defined in claim 1, wherein said frame further comprises an electrically nonconductive coating.

9. An adjustable support rack as defined in claim 8, wherein said coating has a dielectric strength value of at least 600 volts/meter and a thickness of about 4 mil to about 8 mil.

10. An adjustable support rack for supporting firestop material in a through-penetration, comprising:

(a) a frame sized to fit within the through-penetration;

(b) at least one adjustable support member movably connected with said frame for supporting the firestop material; and

(c) an adjustable mounting mechanism connected with said frame for securing said frame within the through-penetration, wherein said adjustable mounting mechanism comprises a first fixed extension extending from said first side portion, a first latch slidably retained within said first side portion operatively associated with said first extension, a second fixed extension extending from said second side portion, a second latch slidably retained within said second side portion operatively associated with said second extension, each said latch having a retracted position wherein said latch is arranged in close relation to its associated extension, and an actuated position wherein said latch is arranged away from its associated extension for engagement with the through-penetration, thereby to secure the support rack in the through-penetration.

11. An adjustable support rack for supporting firestop material in a through-penetration, comprising:

(a) a frame sized to fit within the through-penetration;

(b) at least one adjustable support member movably connected with said frame for supporting the firestop material; and

(c) an adjustable mounting mechanism connected with said frame for securing said frame within the through-penetration, wherein said adjustable mounting mechanism comprises a manually operable threaded device capable of engaging the through-penetration with sufficient force to securely hold said support rack in place.

12. An adjustable support rack for supporting firestop material in a through-penetration, comprising:

(a) a frame sized to fit within the through-penetration;

(b) at least one adjustable support member movably connected with said frame for supporting the firestop material;

(c) an adjustable mounting mechanism connected with said frame for securing said frame within the through-penetration; and

(d) an enclosure arranged to cover the firestop material.

13. An adjustable support rack for supporting firestop material in a through-penetration, comprising:

(a) a frame sized to fit within the through-penetration;

(b) support means movably connected with said frame defining a generally planar support surface for supporting the firestop material; and

(c) mounting means connected with said frame for securing said frame within the through-penetration, said mounting means extending in a direction parallel to said planar support surface and being movable beyond the periphery of said frame to engage the through-penetration.

14. A firestop for preventing the spread of fire from one compartment of a structure to another, comprising:

(a) a frame sized to fit within the through-penetration;

(b) at least one adjustable support member movably connected with said frame for supporting firestop material;

(c) an adjustable mounting mechanism connected with said frame for securing said frame within the through-penetration; and

(d) firestop material arranged on said support member.

15. A firestop as defined in claim 14, wherein said firestop exhibits fire stopping properties sufficient to meet the temperature and flame criteria set forth in ASTM E814 for cable fills up to 35% for a one hour rating.

16. A firestop as defined in claim 15, wherein said firestop has fire stopping properties sufficient to achieve an L rating as set forth in UL 1479 of 2.49 cubic feet per minute per square foot for a cable fill of 15% at 400°

F.

17. A method of fire stopping a through-penetration in a wall, floor, ceiling, or the like, comprising the steps of:

(a) providing an adjustable support rack including support members movable within an open area of the support rack for supporting firestop material in the through-penetration;

(b) mounting the support rack in the through-penetration;

(c) arranging the support members to maximize coverage of the open area; and

(d) arranging firestop material on the support rack.

18. A method of fire stopping a through-penetration as defined in claim 17 further comprising the step of providing an enclosure covering the firestop material.