Responder correo de dudas finales de HQC

Jose Adrian Gonzalez: 4.1 The scope of this auditing is on basic design drawings only.

Jose Adrian Gonzalez: 4.2 Please check the scope of civil& structural engineering work and make sure that there are no items are omitted.

Jose Adrian Gonzalez: 4.3 The foundation weight for pumps shall be at least 3~5 times the total machinery weight, unless specified otherwise bythe Manufacturer. Please check.

Jose Adrian Gonzalez: 4.4 Please check whether or not additional hoops are required within the embedment depth of anchor bolts in foundationpedestals.

Jose Adrian Gonzalez: 4.5 Please check if the elevations of TOC (Top of concrete) satisfy with the upstream input information.

Jose Adrian Gonzalez: 4.6 In the material list for foundations, some of the quantities are for one unit, some are the summaries of all the foundationsof the same size and some of the quantities are not correct. Please check.

Jose Adrian Gonzalez: 4.7 Please check if there is any requirement for the minimum embedment depth of foundations.

Jose Adrian Gonzalez: 4.8 Quantity of material for grouting is not included in the Bill of Quantities provided by VEPICA. Please check.

Jose Adrian Gonzalez: 4.9 Please check whether or not the materials for anchor bolt, embedment, ladders and handrails have been incorporated inthe Bill of Quantities.

Jose Adrian Gonzalez: 4.10 HQC advises changing the mat foundations to isolated footings and increase the embedment depth (for Pipe racks&Steel Structure and Air Cooler of DRU).

Oscar Delgado: 4.11 HQC suggests adding proper horizontal bracings for the steel structure. (PMJ-D-5088-10-2424-D001)

Oscar Delgado: 4.12 Please add vertical bracing or supporting post for the 3-meter long cantilever beam. (PMJ-D-5088-10-2424-D001)

Jose Adrian Gonzalez: 4.13 For the pipe racks, sizes of foundations for the bracing bay shall be larger than the general bays and tie beams andshear keys for the column base shall be provided for the bracing bay.

Jose Adrian Gonzalez: 4.14 Concrete supporting slabs shall be provided for embedded vessel V-1603.

Jose Adrian Gonzalez: 4.15 For undulated terrain, top of foundations for pipe racks shall be terraced for the convenience of foundation constructionand fabrication of steel columns.

Jose Adrian Gonzalez: 4.16 Please check whether or not adequate expansion joints are provided for the long pipe racks; Details for expansionjoints shall be optimized considering modularization design;

Jose Adrian Gonzalez: 4.17 For 7-meter wide pipe racks, the two middle columns shall be connected by lace bars to form a latticed column.

Jose Adrian Gonzalez: 4.18 Please verify the requirement for backfilling within the ring wall foundations for tanks and incorporate the relevantmaterials into Bill of Quantities.

Jose Adrian Gonzalez: 4.19 Construction joints shall be provided for large diameter ring wall foundations of tanks.

Jose Adrian Gonzalez: 4.20 For Control Room, HQC advises adding concrete column at the intersection of Axis F and 2.

Jose Adrian Gonzalez: 4.21 According to the design drawing, the load path is not clear for the rib roof slab of Control Room.

Jose Adrian Gonzalez: 4.22 Proper engineering measures shall be considered by the designer to minimize the effect of temperature changes forthe projecting eaves of Control Room.

Jose Adrian Gonzalez: 4.23 According to the design drawing, rib slab is used for the roof of Control Room. This will result in enormous cost offormworks; HQC suggests using flat roof slabs.

Jose Adrian Gonzalez: 4.24 Foundations for the two pipe racks between the Desalters were not shown in the Foundation Layout drawing. Pleasecheck if the materials for these two pipe racks have been incorporated into Bill of Quantities.

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