The interior of the big box store is framed with open web steel joists and joist girders supported on HSS (square tube) columns. A partial framing plan showing 4 bays in the building corner is shown below. (The building is 10 bays across and 8 bays deep). The columns are 24’-0” tall. The HSS 8x8x3/8 weigh 37.6 plf, the 24K10 weigh 13.1 plf, and the 36G9N10K weigh 57.0 plf. The roofing consists of open, 1-1/2” deep, Type B, galvanized, 22 gauge, acoustical perforated steel decking with fiberglass insulation that weighs 1.78 psf. (See attachment 1)Determine the total quantity of steel in the building, in tons. Determine the national average bare cost for the columns using section 05 12 23 of RSMeansDetermine the national average bare cost for the joists using section 05 21 19 of RSMeansDetermine the national average bare cost for the joist girders using section 05 21 23 of RSMeans. Determine the national average bare cost for the steel roof decking using section 05 31 23 of RSMeans. Add 10% for waste and laps. A roof framing plan for a building is shown below in Figure 1. The columns are 20 feet high. The flange width for the W12X35 is 6 ½ inches and the flange width for the W12X72 is 12 inches. In addition, the properties of the columns are given below in Table 1. (See attachement #2)Prepare a structural steel materials list for the roof framing plan shown below.In addition, determine the number of pounds of structural steel that need to be purchased for the roof.What is the weight of the heaviest structural steel member needed to construct the roof? 45ft45ft24K10@5Q.C., TYP.-8" CMU WALL, TYP.45ft-36G9N10K TYP.HSS45ft 12'-6"-12'-6"C1ColumnC1C2C3W12x35C2W12x3512'-6" 12'-6"5_W12x35W12x35W12x35W12x35W12x3525'-0"15'-0"C2W12x72C12x30C3W12x728.0" W12x35C2W12x35SizeW8 X 28C12x30W12 X 40W12 X 53W12x35W12x35W12x3525'-0"W12x72W12x72 8C3Figure 1. Steel Framing PlanC2Table 1: Column PropertiesFlangeWidth (in.)6.5358.0059.995W12x35W12x35W12x35W12x35W12x3525'-0"C1W12x35C2W12x35C1Depth (in.)8.0611.9412.06

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Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The interior of the big box store is framed with open web steel joists and joist girders supported on HSS (square tube) columns. A partial framing plan showing 4 bays in the building corner is shown below. (The building is 10 bays across and 8 bays deep). The columns are 24’-0” tall. The HSS 8x8x3/8 weigh 37.6 plf, the 24K10 weigh 13.1 plf, and the 36G9N10K weigh 57.0 plf. The roofing consists of open, 1-1/2” deep, Type B, galvanized, 22 gauge, acoustical perforated steel decking with fiberglass insulation that weighs 1.78 psf. (See attachment 1)
1. Determine the total quantity of steel in the building, in tons.
2. Determine the national average bare cost for the columns using section 05 12 23 of RSMeans
3. Determine the national average bare cost for the joists using section 05 21 19 of RSMeans
4. Determine the national average bare cost for the joist girders using section 05 21 23 of RSMeans.
5. Determine the national average bare cost for the steel roof decking using section 05 31 23 of RSMeans. Add 10% for waste and laps.

A roof framing plan for a building is shown below in Figure 1. The columns are 20 feet high. The flange width for the W12X35 is 6 ½ inches and the flange width for the W12X72 is 12 inches. In addition, the properties of the columns are given below in Table 1. (See attachement #2)

Prepare a structural steel materials list for the roof framing plan shown below.
In addition, determine the number of pounds of structural steel that need to be purchased for the roof.
What is the weight of the heaviest structural steel member needed to construct the roof?

45ft
45ft
24K10@5Q.C., TYP.
-8" CMU WALL, TYP.
45ft
-36G9N10K TYP.
HSS
45ft

12'-6"-12'-6"
C1
Column
C1
C2
C3
W12x35
C2
W12x35
12'-6" 12'-6"
5_
W12x35
W12x35
W12x35
W12x35
W12x35
25'-0"
1
5'-0"
C2
W12x72
C12x30
C3
W12x72
8.0" W12x35
C2
W12x35
Size
W8 X 28
C12x30
W12 X 40
W12 X 53
W12x35
W12x35
W12x35
25'-0"
W12x72
W12x72 8
C3
Figure 1. Steel Framing Plan
C2
Table 1: Column Properties
Flange
Width (in.)
6.535
8.005
9.995
W12x35
W12x35
W12x35
W12x35
W12x35
25'-0"
C1
W12x35
C2
W12x35
C1
Depth (in.)
8.06
11.94
12.06

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