Temporary works are essential structures used during construction activities to support permanent works until they become self-supporting. For carpentry and joinery professionals in Kenya, understanding how to set out and prepare for temporary works ensures site safety, structural integrity, and compliance with regulations. Proper preparation involves not only technical skills but also adherence to safety protocols, especially the use of personal protective equipment (PPE). This chapter focuses on the critical role of PPE in protecting workers involved in temporary works.

1.1 Personal Protective Equipment

Personal protective equipment is the first line of defense against workplace hazards in carpentry and joinery, particularly when handling temporary works such as formwork, scaffolding, and shoring. In Kenya, construction sites regulated by the Directorate of Occupational Safety and Health Services (DOSHS) require strict PPE use to reduce accident rates. PPE includes gloves, helmets, and safety boots, each designed to protect specific parts of the body from injury.

1.1.1 Gloves

Gloves are vital for protecting hands from cuts, abrasions, splinters, and chemical exposure during carpentry and joinery tasks.

Types of Gloves Used in Carpentry and Joinery

There are several types of gloves suited for different tasks in temporary works:

• Leather gloves offer excellent abrasion resistance and are ideal for handling timber and rough materials.

• Rubber gloves provide protection against chemicals such as adhesives and solvents used in joinery finishing.

• Cut-resistant gloves made from materials like Kevlar are necessary when working with sharp tools or cutting equipment.

• Cotton gloves are useful for light handling but offer minimal protection against punctures or chemicals.

• Welders’ gloves may be required when temporary works involve metal fixing or welding.

Importance of Gloves in Preventing Injuries

Gloves prevent direct contact with hazardous materials and reduce the risk of hand injuries, which are common on construction sites. For example, at a county government construction project in Nakuru, workers who consistently wore cut-resistant gloves reported fewer incidents of lacerations during formwork assembly. Proper gloves also reduce the chance of infections from splinters or chemical burns, supporting overall site hygiene and worker health.

Proper Selection and Fit of Gloves

Selecting gloves that fit well is crucial for safety and dexterity. Oversized gloves can catch in machinery, while tight gloves can restrict movement and blood flow. Workers at a Nairobi-based hotel renovation project found that gloves with adjustable wrist straps provided better comfort and prevented debris ingress, enhancing productivity during timber framework erection.

Maintenance and Replacement of Gloves

Gloves should be inspected daily for signs of wear, tears, or contamination. Damaged gloves lose their protective properties and must be replaced immediately. For instance, at a cooperative carpentry workshop in Kisumu, routine glove inspections reduced hand injury incidents by 40% over six months. Cleaning gloves according to manufacturer instructions extends their lifespan and maintains effectiveness.

1.1.2 Helmet

Standards and Specifications for Safety Helmets

In Kenya, safety helmets must comply with the Kenya Bureau of Standards (KEBS) guidelines, ensuring they meet impact resistance and electrical insulation requirements. Helmets typically are made from high-density polyethylene (HDPE) and include a suspension system to absorb shocks. Construction sites at Nairobi County government offices strictly enforce helmet standards to prevent head injuries during scaffold installation.

Types of Helmets for Temporary Works

Different helmets serve various functions:

• General purpose helmets protect against minor bumps and falling debris.

• Electrician helmets have non-conductive properties for work near live wires.

• High-visibility helmets include reflective strips for low-light conditions.

• Vented helmets enhance airflow for comfort in hot environments, such as in Mombasa’s coastal regions.

Proper Wearing and Adjustment of Helmets

A helmet must fit snugly without causing discomfort. The suspension system should be adjusted so the helmet sits level on the head and does not obstruct vision. Workers at a university construction site in Eldoret reported fewer accidents after receiving training on correct helmet adjustment, highlighting the importance of proper use.

Inspection and Replacement Criteria

Helmets should be inspected for cracks, dents, and degradation caused by UV exposure. The lifespan of a helmet is generally three to five years depending on use conditions. At a retail business expansion site in Thika, helmets were replaced every three years, and any helmet involved in a heavy impact was discarded immediately to guarantee safety.

1.1.3 Safety Boots

Safety boots protect feet from sharp objects, heavy materials, electrical hazards, and slips, which are common risks during temporary works in carpentry and joinery.

Importance of Safety Boots in Construction

Safety boots prevent injuries such as fractures, punctures, and burns. For example, at a SACCO office construction in Kisii, workers wearing steel-toe boots avoided serious foot injuries during timber unloading, compared to unprotected workers who suffered multiple accidents.

Selection Criteria for Safety Boots

Choosing the right safety boots depends on the work environment and hazards present. Slip resistance is critical on wet or dusty floors, while toe protection is essential when handling heavy timber. At a county hospital expansion site in Meru, composite-toe boots were preferred to reduce fatigue during long shifts without sacrificing protection.

Proper Use and Fit of Safety Boots

Boots must fit well to avoid blisters and provide adequate support. Ill-fitting boots can cause discomfort and reduce mobility, increasing accident risk. Workers at a school renovation in Kisumu reported fewer foot injuries after switching to boots with better arch and ankle support.

Maintenance and Care of Safety Boots

Regular cleaning and inspection extend the life of safety boots. Damaged soles or compromised waterproofing reduce safety and should prompt replacement. At a cooperative carpentry firm in Nakuru, scheduled boot maintenance improved worker morale and reduced sick days related to foot injuries.

Chapter Summary

This chapter covers essential aspects of setting out and preparing for temporary works with a focus on safety and accuracy. It begins by emphasizing the importance of personal protective equipment such as gloves, helmets, and safety boots to ensure worker safety. The chapter then explores the interpretation and preparation of drawings for temporary structures, including units conversion, understanding symbols and abbreviations, the use of drawing equipment, and the skill of freehand sketching. Attention is given to the selection and use of tools, equipment, and materials, highlighting hand tools, portable power tools, timber, manufactured boards, and effective material handling techniques. Accurate measuring and marking out procedures are detailed, covering the necessary tools, measuring methods, marking out, cutting, and joining components to ensure precision. Safety regulations and risk management are discussed extensively, focusing on safety practices, material quality standards, workshop and site safety standards, as well as general safety protocols. The chapter concludes by addressing housekeeping practices that maintain an organized and safe working environment throughout the temporary works process.