Reference to your letter date December 19, 2013 “Crash Rating for K4 & K12 Precast Wallâ€, SAPMT responses to your letter are given below:

1.	SAPMT letter K&TPD/KRP&SFPD/SF/L-315/13 dated December 16, 2013 clearly mentions what’s written in the specifications i.e. ACI for design and K-ratings for performance. ICC cannot deny the fact that K-rating is explicitly mentioned in the specifications. K-ratings are driven from a certain standard (STD-02.01) which requires testing to be done and does not rely on design only.
2.	SAES-O-21 (Application of Security Directives) relies completely on HCIS where both referenced on the contract in conjunction with ASTM Standards.
3.	Appendix-D in scope of work refers to ACI for design standards but also requires K-ratings to be met. ICC has to prove the rating criteria are met for both types (K4 & K12). Appendix-D also requires grade beams to be constructed to carry the precast concrete walls which ICC has neglected and the design must be adjusted to include such a requirement.
According to SCH-B, 3.1.1 absence of comments from SAPMT does not relieve ICC from performing its obligations under the scope of work. Additionally, K-ratings related to crash testing are not just about vehicle loads only but also are based on the maximum penetrating distance measured from the front-most edge of a vehicle’s truck bed to the backside face of the barrier after impact. The shorter the truck bed’s penetrating distance, the higher the barrier’s performance level will be to stop vehicular intrusions and the longer the blast "stand-off distance". No design standard can prove K-rating unless a crash testing is used to prove it. Appendix-D also refers to all ASTM standards for testing materials including HCIS standards.
SAPMT believes that crash rating is an integral part of Contract No.6600029847 scope of work and any intentions neglecting the proof of K-rating of the Walls cannot be accepted.

Should you have any questions, please contact Fahad A. Al-Balawi, Sr. Project Engineer on Tel.  No. +966 12 422 4393.
                                                                                
