Permit:             C16-1596

                        X16-2092
Change Order/Deferred Submittal for Curtain Wall

Date:               1-17-2017

Reviewed by: Ron Wilde                                                                  

Phone:             343-8371

Fax:                 343-8200

Email:              wilderg@muni.org

Project:            Dimond
Center South Entry Stairs

Change
Order/Deferred Submittal for Curtain Wall

1.  PERMIT STATUS

1-17-2016 – Permit reviewed. Comments issued.

2.  Advisory Comment (no response required):  This review is based on the requirements of
the 2012 Anchorage Administrative Code (AMC 23.10), 2012 International Building
Code (IBC), and all adopted references thereto as amended by MOA. The following
comments must be addressed before a permit can be issued. The approval of plans
and specifications does not permit the violation of the codes, or any federal,
state or local regulations.

Please submit a
written explanation for how each comment has been addressed.

3.  LOAD PATH – STEEL PORTION OF MULLION TO
SUPPORTS

The steel portion of the mullion takes approximately 70
percent of the composite aluminum/steel mullion.  Please provide design and details to show how
the reaction in the steel and aluminum portions is transferred to the
structure. 

The submitted details do not appear to follow the
standard Kawneer drawings for attachment to the structure by through bolts that
go through both the steel and the aluminum. 
Please coordinate with Kawneer.

4.  DETAIL 1 (SKS9) – CURTAIN WALL ATTACHMENT AT
ROOF

This detail transfers load only out of an aluminum cap
plate of unknown thickness on top of the aluminum mullion.  No attachment of the aluminum cap plate to
the aluminum mullion is shown.  Please
show how the force is transferred from both the aluminum (162003) and steel
mullions (162301/302).

5.  DETAIL 1 (SKS9) – CURTAIN WALL ATTACHMENT AT
ROOF – STEEL BENT PLATE

Unless this plate is intended to be continuous, please
show its width on the drawing.  The
calculations on page 315 show the width to be almost 13 inches.

6.  DETAIL 1 (SKS9) – CURTAIN WALL ATTACHMENT AT
ROOF – STEEL BENT PLATE WELDING.

Unless this plate is intended to be continuous, please
show the welding for each plate rather than a skip weld.  Please note that if this plate is intended to
be continuous, placing the weld will be difficult and may impact the capacity
of the shear connection of the metal deck. 
Please clarify any needed precautions for cutting the deck.

7.  DETAIL 1 (SKS9) – CURTAIN WALL ATTACHMENT AT
ROOF – MEMBRANE BETWEEN ALUMINUM AND STEEL

Please identify the kind and thickness of membrane.

8.  DETAIL 1 (SKS9) – CURTAIN WALL ATTACHMENT AT
ROOF

STAINLESS STEEL
CONNECTORS – AUSTENITIC STAINLESS STEEL

Please show on the drawings that the stainless steel
connectors are to be “austenitic, or else that they comply with the
requirements of 2005 Aluminum Design Manual (ADM), 5.4.1 or the 2010 ADM
equivalent.

9.  DETAIL 1 (SKS9) – CURTAIN WALL ATTACHMENT AT
ROOF – BOLTS

It is not clear how bolts can be installed.  Please clarify or delete this option.

10.  DETAIL 3 (SKS3) – CURTAIN WALL SUPPORT FRAME
– CONNECTION TO SUPPORT ANGLE

The sketch indicates that the manufacturer will supply
this detail.  The design and detail needs
to be supplied and reviewed before a permit can be issued.  The detail needs to show how the force is
transferred from both the aluminum (162003) and steel mullions (162301/302).

11.  SUBMITTAL DRAWINGS

Please submit 2 full-size final sets of drawings that
show how the curtain wall is to be constructed. 
Please include both layout drawings with member identification and
connections, along with drawings that show how the curtain wall attaches to the
structure.  The drawings need to be
complete such that a contractor can order and install the curtain wall.  If a member is necessary, identify it and
give design properties, dimensions, and material.  If connections are necessary, identify the
fastener and its material, and show how many and where the fasteners are
located.

Please note that the Kawneer drawing that has already
been submitted does not identify the mullions or their steel core and does not
show how the core is connected to the aluminum. 
This is not sufficient.