Erecting structural elements is a critical phase in building construction that demands precision, safety, and effective coordination. Structural components such as columns, beams, and walls form the framework that supports the entire superstructure, defining the building’s strength and stability. In Kenya, where construction sites often involve multiple trades and varying site conditions, adherence to safety protocols including the use of Personal Protective Equipment (PPE) is essential. This chapter focuses on the use of PPE to protect workers during the erection of structural elements, ensuring compliance with occupational health and safety standards.

1.1 PPEs

PPEs are indispensable in construction activities to minimize exposure to hazards that can cause serious injuries or illnesses. In the context of erecting structural elements, PPEs protect workers from falling objects, sharp materials, dust, noise, and other site-specific risks. Kenyan construction sites, regulated by the Directorate of Occupational Safety and Health Services (DOSHS), require strict PPE use to promote a safe working environment and reduce accident rates.

1.1.1 Types of PPEs Used in Erecting Structural Elements

The variety of PPEs used during structural erection reflects the diverse hazards present on construction sites. Workers must be equipped with appropriate gear to guard against mechanical, chemical, and environmental risks.

Common PPEs include the following:

• Safety Helmets: These protect the head from impact injuries caused by falling objects or accidental bumps against structural components. At a county government office construction site, safety helmets were mandatory to prevent head injuries during beam installation.

• Safety Gloves: Gloves safeguard hands from cuts, abrasions, and chemical exposure when handling steel reinforcements or concrete. In a retail business construction project, gloves helped workers avoid injuries from sharp steel ties.

Pair of safety gloves for building work (Source: Wikimedia Commons)

• Safety Boots: Footwear with steel toe caps and puncture-resistant soles protects feet from crushing hazards and sharp debris. For example, in a hospital expansion project, boots prevented serious injuries from dropped tools and scattered nails.

worn black safety boots on wooden floor (Source: Wikipedia (Steel-toe boot))

• Eye Protection: Safety goggles or face shields prevent eye injuries from flying particles, dust, and chemical splashes during welding or cutting of steel elements. At a university building site, goggles were critical during welding of steel columns.

clear safety glasses for eye protection (Source: Wikimedia Commons)

• High-Visibility Clothing: Reflective vests or jackets ensure workers are visible to crane operators and vehicle drivers, reducing the risk of accidents, especially in low light conditions. A SACCO office construction site enforced high-visibility clothing for all personnel near heavy machinery.

1.1.2 Selection Criteria for PPEs in Structural Erection

Choosing the right PPE depends on the specific tasks, hazards, and environmental conditions present on the construction site. Proper selection enhances protection and worker comfort, which improves compliance.

Key factors influencing PPE selection include:

• Hazard Type: Identification of risks such as falling objects, sharp edges, or chemical exposure guides the choice of helmet, gloves, or respirators. For instance, at a county hospital expansion, respirators were selected due to high dust levels during concrete cutting.
• Work Environment: Weather conditions and site layout affect PPE type; waterproof gear is necessary during rainy seasons common in Nairobi's construction sites.
• Task Duration and Frequency: PPE designed for long-term wear must balance protection with comfort to prevent fatigue and encourage consistent use.
• Fit and Size: Ill-fitting PPE reduces effectiveness and may cause safety hazards. A retail business construction contractor ensured all workers had properly sized boots and helmets.
• Compliance with Standards: PPE should meet Kenyan and international safety standards such as ISO or ANSI to guarantee reliability and durability.

1.1.3 Proper Use and Maintenance of PPEs on Construction Sites

Using PPE correctly is as important as wearing it. Improper use or poorly maintained equipment compromises safety and increases the risk of injury during erecting structural elements.

Guidelines for PPE use and upkeep include:

• Correct Wearing Procedures: Helmets must be securely fastened and gloves properly fitted to maximize protection. At a cooperative housing project, supervisors conducted daily checks to ensure helmets were worn correctly.
• Regular Inspection: PPE should be inspected daily for cracks, tears, or wear that could reduce effectiveness. For example, safety boots were checked at a hotel construction site for sole integrity to prevent puncture injuries.
• Cleaning and Storage: Equipment must be cleaned according to manufacturer instructions and stored in dry, safe places to prevent damage. At a county government office site, PPE lockers were provided to protect gear from dust and moisture.
• Timely Replacement: Damaged or expired PPE must be replaced immediately to maintain safety standards. A university construction project had a strict replacement policy for gloves that showed signs of wear.
• Training on PPE Use: Workers should receive training on the importance, correct use, and maintenance of PPE to foster a safety culture. NHIF building contractors provided refresher courses on PPE handling to reduce accidents.

1.1.4 Legal Requirements and Enforcement of PPE Use in Kenya

Kenyan law mandates the use of PPE on construction sites to protect workers from occupational hazards. Enforcement of these regulations ensures compliance and reduces workplace injuries.

Legal framework and enforcement mechanisms include:

• Occupational Safety and Health Act (OSHA) 2007: Requires employers to provide and enforce the use of PPE for employees exposed to hazards during construction activities.
• Directorate of Occupational Safety and Health Services (DOSHS): Conducts inspections and issues directives to ensure PPE compliance on construction sites.
• Penalties for Non-Compliance: Employers or contractors failing to enforce PPE use may face fines, work stoppages, or legal action. For instance, a county government office contractor was fined for inadequate PPE provision during beam erection.
• Worker Responsibilities: Employees must use PPE properly and report defective equipment to supervisors to uphold safety standards.
• Safety Committees: Many construction sites establish committees to monitor PPE use and recommend improvements, as seen in a Nairobi retail business project where safety audits are conducted regularly.

Chapter Summary

This chapter covered essential aspects of erecting structural elements in building superstructure works. It began with the importance of personal protective equipment to ensure safety during construction activities. The assembly and proper use of tools and equipment necessary for handling structural elements were then discussed, followed by the preparation of materials to meet quality and specification standards. The process of fixing reinforcement bars was explained, highlighting the need for accuracy to maintain structural integrity. Next, the erection of formwork was described as a critical step in shaping and supporting concrete until it hardens. The chapter also detailed the correct placing of concrete to avoid defects, and the timely striking of formwork to prevent damage to the structure. Finally, the curing requirements were emphasized to ensure the concrete achieves the desired strength and durability.