The steel framing plan of a small building is shown in Figure 1.3a. The floor consists of a 5-in.-thick reinforced concrete slab supported on steel beams (see section 1-1 in Figure 1.3b). Beams are connected to each other and to the corner columns by clip angles; see Figure 1.3c. The clip angles are assumed to provide the equivalent of a pin support for the beams; that is, they can transmit vertical load but no moment. An acoustical board ceiling, which weighs 1.5 lb/ft?, is suspended from the concrete slab by closely spaced supports, and it can be treated as an additional uniform load on the slab. To account for the weight of ducts, piping, conduit, and so forth, located between the slab and ceiling (and supported by hangers from the slab), an additional dead load allowance of 20 lb/ft? is assumed. The designer initially estimates the weight of beams B1 at 30 lb/ft and the 24-ft girders B2 on column lines 1 and 2 at 50 Ib/ft. Establish the magnitude of the dead load distribution on beam B1 and girder B2. panel panel B2 B3 B1 B1 B3 25 5 slab B B2 Duct I Beam B1 B2 suspended ceiling Section 2-2 3 @ 8'= 24' Section 1-1 (b) (c) (a)

The steel framing plan of a small building is shown in Figure 1.3a. The floor consists of a 5-in.-thick reinforced concrete slab supported on steel beams (see section 1-1 in Figure 1.3b). Beams are connected to each other and to the corner columns by clip angles; see Figure 1.3c. The clip angles are assumed to provide the equivalent of a pin support for the beams; that is, they can transmit vertical load but no moment. An acoustical board ceiling, which weighs 1.5 lb/ft?, is suspended from the concrete slab by closely spaced supports, and it can be treated as an additional uniform load on the slab. To account for the weight of ducts, piping, conduit, and so forth, located between the slab and ceiling (and supported by hangers from the slab), an additional dead load allowance of 20 lb/ft? is assumed. The designer initially estimates the weight of beams B1 at 30 lb/ft and the 24-ft girders B2 on column lines 1 and 2 at 50 Ib/ft. Establish the magnitude of the dead load distribution on beam B1 and girder B2. panel panel B2 B3 B1 B1 B3 25 5 slab B B2 Duct I Beam B1 B2 suspended ceiling Section 2-2 3 @ 8'= 24' Section 1-1 (b) (c) (a)

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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