In 2013, The Ministry of Forestry revealed that the need for wood as material for construction was always increasing. In order to find the innovations regarding timber structure, this study was conducted to discover the flexural strength of gelam and sengon based on SNI 03-3959-1995. Also, specimens which 50 mm in depth, 50 mm in height and 760 mm in length were tested using two point loading method based on ASTM D-198. This research showed that the average flexural strength of gelam is 100.13 Mpa which is greater than sengon (82.62 Mpa). Furthermore, as simple truss structure, simulation indicated that gelam and sengon are still capable in resisting moment generated from service load.

Balikpapan as a developing city had a constant increasing in vehicle volume every year, it cause majority of traffic network in Balikpapan could not handle the increasing of vehicle volume in some of the road and intersection which cause traffic jam, one of the worst case is Kariangau intersection in km 5.5. Hopefully the result of this study will give accurate modeling and analyzing performance of Kariangau intersection and give alternative solution to increase performance of Kariangau intersection. The method that has been used in this study of Kariangau intersection is literature research, surveying, collecting data using counting machine and data analysing according to MKJI 1997 and modelling traffic flow using Vissim 9 software. The Analyzation according to MKJI 1997, average traffic flow (Q) in Kariangau intersection is 5,096 pce/hr, density (DS) 2.279, delay is 1.062 sec/pce and queue up to 252-649%. With the implementation of traffic light in Kariangau intersection, it will decrease the average traffic flow up to 1,248 pce/hr dan density up to 0.756 or up to 67%.