This student module on safety features for floor and wall openings and stairways is one of 50 modules concerned with job safety and health. This module suggests safeguards to protect workers from falling and tripping, and from injury caused by falling tools and materials. Following the introduction, eight objectives (each keyed to a page in the text) the student is expected to accomplish are listed (e.g., Describe fixed stairway strength and construction). Then each objective is taught in detail, sometimes accompanied by illustrations. Learning activities are included. A list of references and answers to learning activities complete the module. (CT)