Brain Tease: Fire hatch between floors

[cda]

""""There is a maintenance hatch between floors which are a fire rated assembly. The hatch is in the normally open position for routine maintenance and will close via a fusible link.

The architect specified this fusible link.

http://globetechnologies.com/catalog...products_id=84

Is this link acceptable? """"""""

if an architect is invovled I kind of take it as new construction, so is a fusable link door allowed in new construction????????

 

[mtlogcabin]

704.2 Opening protectives. When openings are required to beprotected, opening protectivesshall be maintained self-closing or automatic-closing by smoke detection. Existing fus­ible-link-type automatic door-closing devices are permittedif the fusible link rating does not exceed 135°F (57°C).

Commentary

•:•This section requires that fire door assemblies pro­vided for protection of openings in vertical enclosures be self-closing or automatic-closing in order to main­tain the integrity of the vertical opening enclosure. This section also recognizes that some opening protectives in existing buildings may already be equipped with heat-actuated closing devices rather than the smoke-detector-actuated devices otherwise required by the section. Such devices are allowed to continue in service, provided that the temperature rating of their fusible element is as low as is available [i.e., 135°F (57°C)] to provide the fastest possible operation in the event of a fire. In the event that an existing fusible link on an opening protective is rated higher than the maxi­mum 135°F (57°C) allowed by this section, it would need to be removed and the door maintained as self-closing or be replaced with a smoke-detector-ac­tuated closer in accordance with this section. New opening protectives must comply with Section 715 of the IBC and closing devices with Section 715.4.8 of the IBC. See the commentary to those sections for further information.

Like I said IFC 704.2 is not for new construction

if an architect is invovled I kind of take it as new construction, so is a fusable link door allowed in new construction????????

I thought he was refering to new construction that is why I posted the way I did. NO a fusible link is not allowed unless it is part of the listing for the access door

 

[fireguy]

https://www.globetechnologies.com/model-b-fusible-link.php

A 135°F link is available, but is not FM listed. Is FM listing needed for this application? My concern is using a 165°F link with 155°F sprinklers. What is the temp of the installed sprinklers, assuming there are sprinklers.

https://www.globetechnologies.com/fusible-links.php The model K & ML are also listed for 135°F temps and are much more readily available. The k and ML links are the same length as the B link. However, the K & ML links have higher weight limitations.

Have you contacted the architect?

 

[jar546]

https://www.globetechnologies.com/model-b-fusible-link.phpA 135°F link is available, but is not FM listed. Is FM listing needed for this application? My concern is using a 165°F link with 155°F sprinklers. What is the temp of the installed sprinklers, assuming there are sprinklers.

https://www.globetechnologies.com/fusible-links.php The model K & ML are also listed for 135°F temps and are much more readily available. The k and ML links are the same length as the B link. However, the K & ML links have higher weight limitations.

Have you contacted the architect?

This is an exercise for the forum, not an actual situation. Thank you for the research and input.

 

[FM William Burns]

Doah............ now I'll perform better the next teaser............. Jeu guiese, pretty