In early 1997, FERIC performed an operational evaluation of five onboard weigh scales for semi-trailers. The purpose of the study was to assess the scales in the field under normal operating conditions and as used by the drivers. The scales were based on load cells, pneumatic devices, or combinations thereof, and were intended for uses with either leaf-spring or air suspensions. Data were collected on the ease of use of the scales, their accuracies, and their short-term reliability, and were used to assess the suitability of the scales for in-woods use. The study found that four of the scales were consistently with the tolerance (1500 kg) accepted by the Ministère des Transports du Québec, which served as a reference.
We tested six plant species or mixes at Vegreville, Alberta to determine their ignition and fire behaviour characteristics and whether they could be used along linear corridors to reduce the fire potential at strategic locations. Nine ignition trials over three years and one grass-fire burning into the test plots were completed to allow ranking of the species based on their characteristics. Three of the species were chosen for additional field studies: white clover, yarrow, and Plateau Rocky Mountain fescue.
Ten varieties of hybrid poplars from 7 year-old to 30 year-old plantations were evaluated for OSB production. The clones were chosen for their similarity with aspen as well as their impressive growth. Static bending tests on small solid wood speciments indicate that all poplar hybrids have lower modulus of rupture (MOR) and modulus of elasticity (MOE) than aspen. Although the hybrid poplar varieties evaluated in this study generally had physical characteristics similar in aspen and the properties of the OSB panels made from them were good, manufacture of OSB using substantial quantities of hybrid poplar (i.e. 25% or more) will likely require adjustments to some processing steps.
Related sections in the International Building Code (IBC) were reviewed regarding use of wood components in non-combustible buildings, and light-frame wood buildings or heavy timber buildings greater than 4-storeys in height.
The highlights of this review are:
a) Fire-retardant-treated (FRT) wood can be used in partitions when the required fire-resistance rating is not more than 2 hours. This includes all types and occupancy groups of Types I and II construction;
b) FRT wood can be used in non-bearing exterior walls in Type I, II, III and IV construction;
c) Wood components can be used in interior walls for Type III and IV construction;
d) Wood components can be used in both interior and exterior walls for Type V construction.
When a sprinkler system is installed according to NFPA 13 , it is possible to build a light-frame wood building or heavy timber building over 4-storeys according to the following provisions:
a) Type IIIA 6-storey light-frame wood buildings using FRT wood for exterior walls for Occupancy group B (Business), H-4, and 5-storey light-frame wood buildings for Occupancy group F-2, H-3, I-1(Institutional), R (Residential), S-2;
b) Type IIIB 5-storey light-frame wood buildings using FRT wood for exterior walls for Occupancy group R;
c) Type IV (HT) 6-storeys timber buildings for Occupancy group B, F-2, H-4 and S-2;
d) Type IV (HT) 5-storeys timber buildings for Occupancy group F-1, H-3, I-1, R, S-1 and U.