Determine the bar-spacing factor, cb, for a simply supported rectangular beam with b = 18 in. and No. 4 stirrups. This beam has three No. 7 bars as longitudinal reinforcement. The clear cover is 2 in.

Learners are encouraged to jump into assignments such as discussions, activities, projects, and quizzes right away, before having read the chapters or watched videos/lectures.

Determine the casting-position modification factor, ψt, for a rectangular beam with b = 16 in. and d = 20 in., five galvanized No. 7 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 3 Grade 60 stirrups located every 12 in. along the span. Assume 4,000-psi normal-weight concrete and a clear cover of 1.5 in.

Heat-of-hydration cracking can be prevented by proper mix design and by preventing rapid drying of the surface during the first hour or so after placing.

If φVc = 50 kip and Vu = 58 kip, are stirrups required?

Use ACI 318-14 Table 25.4.2.2 to determine the development length for the straight tension bars (no hooks) in a rectangular beam with b = 18 in. and d = 24 in., five galvanized No. 9 Grade 60 bars placed in the top of the beam, and No. 3 Grade 60 stirrups located every 6 in. along the span. Assume 5,000-psi lightweight concrete and a clear cover of 1.5 in.

A rectangular beam has a cross section of b = 18 in., h = 24 in., and d = 21.5 in. It is reinforced with five No. 5 Grade 60 bars. The concrete strength is 6,400 psi (normal weight). The beam has Grade 60 No. 3 stirrups satisfying ACI 318-14 Sections 9.7.6.2.2 and 9.6.3.3. Determine the strength φMn for this beam.

For a beam with stirrup hooks, the free end of the bar must extend at least _____ from the hook. Assume b1 = 35 in., b2 = 11 in., d1 = 6 in., d2 = 25 in., and that there are three No. 7 longitudinal tension bars and No. 3 stirrups at 6 in. o.c. The stirrup hooks are 90°.

Bond stresses must be absent whenever the stress or force in a reinforcing bar changes from point to point along the length of the bar.

For this question, you may not write on The Time Machine by H. G. Wells. Character growth refers to a character’s ability to change and adapt, based upon circumstances and events in a story. A dynamic character is one who changes in the course of a narrative, due to experiences and interactions with others.The character may change beliefs, attitudes, behaviors, etc. This may be demonstrated through relationships with other characters, or action taken by the character.  It is important to note that “growth” is not always positive. Sometimes, characters change for the worst! The deterioration of a character’s mental state or social interactions may represent the dynamism of that character. (You will need to decide if a character is changing, or if that character’s original value system and attitude are simply on display–unchanged–due to the story’s events.)  For your mini essay, choose one character from a story (it can be a short story, novel, play, or film) that we have discussed this semester. Explain why you think that the character is a dynamic character who demonstrates growth. For this question, you may not write on The Time Machine by H. G. Wells. What actions, thoughts, or shifts in relationships reveal this growth? What seems to have changed? You do not need to quote directly from the literary work, but you must identify specific evidence that supports your assessment of the character’s growth. * Write 300-500 words. You should divide your essay into paragraphs (about 2) and include an introduction and conclusion to the entire mini essay. (The introduction and conclusion need only be one sentence each.) * You will earn points based upon your specificity (reference details from the work you are writing about) and your original thoughts.  *  Do not spend time summarizing the literary work. Instead, keep your focus upon your analysis and supporting your ideas.