HomeMy WebLinkAboutFile Documents.427 Rio Grande Pl.0016.2019 (23).ACBKStructural Plan Review
First Resubmittal
April 24, 2019
June 25, 2019
(Response Review)
Review/Report is based on structural Construction Documents prepared by KL&A, Inc., dated
06/14/2019 (Permit Set) and architectural drawings prepared by Charles Cunniffe Architects,
dated 02/07/2018 and received via electronic transfer on 03/13/2018. Structural drawings are
stamped and signed by the engineer of record.
Project Name: Aspen City Offices
Project Location: 425 Rio Grande Place, Aspen, CO 81611
Review based on International Building Code (IBC) Edition: 2015
Building Construction Type: New City Offices. Structure consists of a four-level steel framed
structure with a slab on grade lower level. Foundation system is concrete foundation walls and
footings. Lateral system consists of steel braced frames and moment resisting frames.
Building Department Jurisdiction: Aspen Building Department
Risk Category: II (IBC 2015 Table 1604.5)
Basic Wind Speed: 115 mph (ultimate)
Exposure: B
Seismic Site Class: C
Importance Factor: Ie = 1.0
Snow Load: 70 psf uniform
Ground Snow Load: 100 psf
Importance Factor: Is = 1.0
Frost Depth: 36”
P a g e | 2
Structural Review Comments:
1. Sheet S0.1 General Notes: Revise the risk category to III, based on the code reviewer
comments. This will affect lateral loads/structural calculations.
Building Department approved category II. Comment addressed.
2. Sheet S2.6 Lower Level Partial Foundation Plan – Area A: Provide Calculations verifying
foundation uplift has been considered at braced frame on grid A and at two locations on
grid 11.
Calculations provided. Comment addressed.
3. Sheet S2.6 Lower Level Partial Foundation Plan – Area A: Provide Calculations verifying
bearing pressure interaction is acceptable structurally at the two footings near grids B-1.
Revised drawings show one footing removed. Comment addressed.
4. Sheet S2.7 Lower Level Partial Foundation Plan – Area B: Provide Calculations verifying
foundation uplift has been considered at braced frame on grid C and along grid 3 between
grids B and C.
Calculations provided. Comment addressed.
5. Sheet S2.8 Lower Level Partial Foundation Plan – Area C: Micropiles are not referenced
in soils report - Please provide letter from CTL/Thompson indicating micropiles are
appropriate for the foundation elements east of grid PJ.
Drawings revised. Micropiles removed. Comment addressed.
6. Sheet S2.9 Main Level Partial Framing Plan – Area A: Provide base connection details at
the two braced frames along grid 11 and another along grid A, along with calculations.
Comment not addressed.
7. Sheet S2.9 Main Level Partial Framing Plan – Area A: Provide base connection details at
moment frame along grid 12, along with calculations.
Comment not addressed.
8. Sheet S2.9 Main Level Partial Framing Plan – Area A: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
9. Sheet S2.10 Main Level Partial Framing Plan – Area B: Provide diagonal brace and
column connection details at braced frame along grid C and frame along grid 3 between
grids B and C, along with calculations.
Comment not addressed.
P a g e | 3
10. Sheet S2.10 Main Level Partial Framing Plan – Area B: Verify cores through precast do
not adversely affect existing precast structure in any way. Provide calculations or
verification that cores do not affect main precast members (typ).
Comment not addressed.
11. Sheet S2.10 Main Level Partial Framing Plan – Area B: Provide calculations indicating
existing precast walls and foundation at stair core are adequate with added gravity and
lateral loads.
Comment not addressed.
12. Sheet S2.10 Main Level Partial Framing Plan – Area B: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
13. Sheet S2.11 Main Level Partial Framing Plan – Area C: At main beam, shear stud layout
needs to be revised to indicate stud count between purlins (typ).
Drawings revised, composite studs changed. Comment addressed.
14. Sheet S2.11 Main Level Partial Framing Plan – Area C: Provide diagonal brace and
column connection details at braced frame along grid J, along with calculations
Comment not addressed.
15. Sheet S2.11 Main Level Partial Framing Plan – Area C: Provide braced frame/column
connections to existing along grid P8, along with calculations.
Comment not addressed.
16. Sheet S2.11 Main Level Partial Framing Plan – Area C: Verify cores through precast do
not adversely affect existing precast structure in any way. Provide calculations or
verification that cores do not affect main precast members (typ).
Comment not addressed.
17. Sheet S2.12 Middle Level Partial Framing Plan – Area A: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
18. Sheet S2.12 Middle Level Partial Framing Plan – Area A: Provide diagonal brace and
column connection details at braced frame along grid A and at two locations along grid
11, along with calculations.
Comment not addressed.
19. Sheet S2.12 Middle Level Partial Framing Plan – Area A: Provide connection details at
moment frame along grid 12, along with calculations.
Comment not addressed.
P a g e | 4
20. Sheet S2.13 Middle Level Partial Framing Plan – Area B: Provide braced frame
connection details along grid C and along grid 3 between grids B and C, along with
calculations.
Comment not addressed.
21. Sheet S2.13 Middle Level Partial Framing Plan – Area B: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
22. Sheet S2.13 Middle Level Partial Framing Plan – Area B: Verify cores through precast do
not adversely affect existing precast structure in any way. Provide calculations or
verification that cores do not affect main precast members (typ).
Comment not addressed.
23. Sheet S2.14 Middle Level Partial Framing Plan – Area C: Verify cores through precast do
not adversely affect existing precast structure in any way. Provide calculations or
verification that cores do not affect main precast members (typ).
Comment not addressed.
24. Sheet S2.14 Middle Level Partial Framing Plan – Area C: Provide braced frame
connection details along grids P8 and J, along with calculations.
Comment not addressed.
25. Sheet S2.14 Middle Level Partial Framing Plan – Area C: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
26. Sheet S2.15 Upper Level Partial Framing Plan – Area A: Provide braced frame connection
details along grid A, along with calculations.
Comment not addressed.
27. Sheet S2.15 Upper Level Partial Framing Plan – Area A: Provide moment frame
connection details along grids 11 and 12, along with calculations.
Comment not addressed.
28. Sheet S2.15 Upper Level Partial Framing Plan – Area A: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
29. Sheet S2.16 Upper Level Partial Framing Plan – Area B: Provide braced frame connection
details at 7 locations on plan, along with calculations.
Comment not addressed.
P a g e | 5
30. Sheet S2.16 Upper Level Partial Framing Plan – Area B: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
31. Sheet S2.17 Upper Level Partial Framing Plan – Area C: Provide braced frame connection
details along grids P8 and J, along with calculations.
Comment not addressed.
32. Sheet S2.17 Upper Level Partial Framing Plan – Area C: At main beams and purlins with
point loads, shear stud layout needs to be revised to indicate stud count between purlins
or point loads (typ).
Drawings revised, composite studs changed. Comment addressed.
33. Sheet S2.19 Roof Partial Framing Plan – Area B and C: Provide braced frame connection
details at 7 locations on plan, along with calculations.
Comment not addressed.
34. Sheet S3.2 Brace Elevations: Finish detailing and provide calculations.
Comment not addressed.
35. Sheet S3.2 Brace/Moment Frame Elevations: Finish detailing and provide calculations.
Comment not addressed.
36. Sheet S4.1 Details: Cross ties are recommended at detail 7/S4.1.
Detail revised, comment addressed.
37. Sheet S4.2 Details: In detail 2/S4.2, additional bolts are required each end if steel
channels are required for shear. Please provide calculations.
Comment not addressed.
38. Sheet S4.3 Details: In detaisl 1 and 4/S4.3, plate and bolt information is missing. Please
provide calculations.
Comment not addressed.
Plan Review by:
Andy Baturevich, P.E.
HCDA Engineering, Inc.
(719) 633-7784
abaturevich@hcdaengineering.com
P a g e | 6
Final Report Review and Local Contact:
Thomas R. Thompson, CBO and ICC Certified Plans Examiner
Sunrise Engineering
6875 South 900 East
Salt Lake City, UT 84047
Cell (303) 328-1546
Office (435) 743-6151 E-mail tthompson@sunrise-eng.com