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Protection of bearing plates in precast construction?

RLGA

RLGA

SAWHORSE
Joined
Oct 18, 2009
Messages
3,317
Location
Phoenix, AZ
I have a client who has brought to me an issue they have encountered regarding a parking garage.The parking structure is of Type I construction per Section 406 (2006 IBC) based on allowable area. The precast manufacturer has stated that the precast components (columns, girders, and tees) have at least the required 2-hour fire-resistive protection. However, this is not the issue.The city plans examiner is requiring that the welds and exposed portions of the bearing plates be protected by a fireproof coating. The construction uses corbels in the precast components for other components to bear on (see partial detail). The bearing plates serve little use in the support of vertical (i.e. gravity) loads.What do you think?View attachment 1213

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City plans examiner is a jackass.

Lateral forces are transferred at the diaphragm (i.e. the topping).

The bearing plates allow for movement due to changes in temperature, humidity, and loading and thereby prevent the creation of stresses between members.

Steel is used to provide a uniform, durable surface which will not chip when members are erected and shimmed.
 
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