Principles on Erection and Inspection of Roof Trusses

12 - 14 March 2024 | Johannesburg | In Person Workshop
This 3 day workshop provides the essential knowledge to Competent persons (as defined in the National Building Regulations) to enable them to carry out roof inspections (of prefabricated timber roof trusses) and sign them off with sufficient knowledge and insight.
ECSA CPD Points: 3
Validation No: ITCSA-TRTI-23
Attendance fees must be paid in full before commencing the course. A full refund will be allowed if an attendee provides one full week’s notice in writing of their inability to attend. If the minimum notice is not given, no refund will be allowed.


  • ITC-SA Bracing Manual Volume 1
  • ITC-SA Bracing Manual Volume 2
  • Note Pad & Pen
  • Hard Hat & Reflector Vest

NB: Please ensure that you wear safety shoes for the site visits.


All candidates will write an assessment on the last day; however candidates will be assessed continually over the course during discussions and especially during the two site visits.


The main objectives of the workshop is to provide the essential knowledge to Competent persons (as defined in the National Building Regulations) to enable them to carry out roof inspections (of prefabricated timber roof trusses) and sign them off with sufficient knowledge and insight. 

A further objective is to provide the required training component towards achieving the professional designation of a Certified Roof Inspector (CRI). 

CRI’s must still meet the minimum requirements of the underlying qualification and relevant work experience, in addition to this training, before being recognised as CRI’s. 

CRI’s only inspect roof under the supervision and Professional Indemnity Insurance of an ITC-SA Accredited Timber Engineer who may utilise CRI’s at their sole discretion.

Roof Inspector as a Professional Designation

While all delegates who graduate from the training course will enjoy enhanced knowledge on the subject of roof inspections, not all of them will graduate as ITC-SA Certified Roof Inspectors. This designation is only obtained through compliance with a number of basic requirements including an academic component, practical or workplace experience and a competency assessment.

A Certified Roof Inspector is defined as a practicing professional who will traditionally come from the built environment, must have prior experience in roof design and construction, and should preferably have a recognized qualification (NQF level 5) in the built environment.

A Certified Roof Inspector may legally only inspect and certify a roof under the supervision and Professional Indemnity insurance of an ITC-SA Accredited Timber Engineer. Please note that Accredited Timber Engineers, as the ultimate responsible party, may choose to utilise or to not utilise any Certified Roof Inspector at their sole discretion.

A Certified Roof Inspector can be registered in this designation, but may only inspect roofs within the specified category, as per below and depending on their proven competencies:

  • Category A – High Risk
    Very complex roofs
  • Category B – Medium Risk
    Complex domestic and simple industrial and commercial roofs, including up to 10 metre spans
  • Category C – Low Risk
    Simple roofs up to and including 8.5 metre span with standard loadings
  • Category D – Low Risk

Understanding Timber Roof Inspections 

Workshop Content

8.00 Registration
8.30 Basic Roof Terminology, including: Rafters, tie beams, webs Gables, hips Truncated hips, true span Overhangs, cantilevers Prefabricated/bolted methods
10.00 Tea/coffee
10.20 Basics of timber design, including loading, and information of relevant codes. Permissible stress and limit state loading explained. Tributary loading.
12.30 Finger lunch
13.30 Bracing in roofs in general: difference in lightly loaded versus heavily loaded roofs. (Experience from the field through slides and pictures)
15.00 Who is the ITC-SA, Role players and their different responsibilities in the timber structures roofing industry
16.00 End of Day 1
8.30 Rafter bracing: why necessary different systems of bracing, study standard bracing details
10.00 Tea/coffee
10.20 Tie beam and web bracing: standard bracing details (case studies of failures with pictures)
12.30 Finger lunch
13.30 Handling, Transportation and Storage of Timber Structures
14.00 Discussion of paperwork required. Discuss who is responsible for paperwork.
14.45 Site visit to a timber roof under construction. (On-site guidance and discussion) – Ensure that own transport is arranged.
16.00 End of Day 2
8.30 Site visit to a different site to see a timber roof in distress and the effects of ineffective bracing – Ensure that own transport is arranged.
10.00 Tea/coffee
10.20 Discussion of site observations
11.00 Discussion of ethics in regard roof inspection
11.30 Questions and answers
12.00 Finger lunch
12.30 Slide show of non-compliant roofs and the consequences
13.30 Assessment
15.00 End of Workshop