A concrete masonry unit is tested for compressive strength and produces the following results: Failure load = 120,000 lb Gross area = 130 sq.in Gross volume 960 cu. in Net volume = 447 cu.in Is the unit categorized as solid or hollow? Why? What is the compressive strength? Does the compressive strength satisfy the ASTM requirements for load bearing units shown? TABLE 8.2 Strength Requirements of Load Bearing and Non-Load- Bearing Concrete Masonry Units (Reprinted, with permission, from ASTM C90, Table 3 and C129, Table 2, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428)

A concrete masonry unit is tested for compressive strength and produces the following results: Failure load = 120,000 lb Gross area = 130 sq.in Gross volume 960 cu. in Net volume = 447 cu.in Is the unit categorized as solid or hollow? Why? What is the compressive strength? Does the compressive strength satisfy the ASTM requirements for load bearing units shown? TABLE 8.2 Strength Requirements of Load Bearing and Non-Load- Bearing Concrete Masonry Units (Reprinted, with permission, from ASTM C90, Table 3 and C129, Table 2, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428)

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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Question

A concrete masonry unit is tested for compressive strength and produces the following results:
Failure load = 120,000 lb
Gross area = 130 sq.in
Gross volume 960 cu. in
Net volume = 447 cu.in
Is the unit categorized as solid or hollow? Why? What is the compressive strength? Does the compressive strength satisfy the ASTM
requirements for load bearing units shown?
...
TABLE 8.2 Strength Requirements of Load Bearing and Non-Load-
Bearing Concrete Masonry Units (Reprinted, with permission, from
ASTM C90, Table 3 and C129, Table 2, copyright ASTM International,
100 Barr Harbor Drive, West Conshohocken, PA 19428)
Minimum Compressive Strength
Based on Net Area MPa (psi)
Туре
Average of Three Units
Individual Units
Load bearing
13.1 (1900)
11.7 (1700)
Non-load-bearing
4.1 (600)
3.5 (500)

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