DJ Engineers & Builders Inc.

Design + Construction
We offer app developers for engineering businesses. All apps we create can be fully owned by our clients. We also sell following android mobile apps for engineering professionals. User can directly purchase here by send the payment, through Google Pay or PayPal, to Daniel@Engineers-Builders.com (Privacy Policy). Or purchase in Google Play Store.

1. Infrastructure Measure:

Directly purchase from us by $50 (Google Pay or PayPal to Daniel@Engineers-Builders.com). Or in Google Store

(Tips: 1. This calculations are directly based on GPS locations, without any map inaccuracy. But GPS are sensitive on small area;
2. Any shape of distances and area can be measured by sum this triangular results.)

2. Structural Vibration Meter:

Directly purchase from us by $289 (Google Pay or PayPal to Daniel@Engineers-Builders.com). Or in Google Store

(Tips: 1. If the frequencies are within 1 to 8 Hz, the structure is inadequate.
2. The structural seismic period based on 2018 IBC & AASHTO LRFD is in horizonal direction, so it is not the reciprocal of this vertical frequency.)

3. Concrete Crack Meter:

Directly purchase from us by $289 (Google Pay or PayPal to Daniel@Engineers-Builders.com). Or in Google Store

(Tips: For high bridge cracking or concrete pier under water, take pictures. Then do the 2 – 4 steps on computer screen.)

4. Deflection Meter:

Directly purchase from us by $178 (Google Pay or PayPal to Daniel@Engineers-Builders.com). Or in Google Store

(Tips: 1. Take screenshots for project records. 2. This is the deflection perpendicular to view direction.)

5. Engineering Ruler:

Directly purchase from us by $12 (Google Pay or PayPal to Daniel@Engineers-Builders.com). Or in Google Store

(Tips: Change the red scale based on the drawings, to directly get project dimensions.)

6. Engineering Compass:

Directly purchase from us by $9 (Google Pay or PayPal to Daniel@Engineers-Builders.com). Or in Google Store

(Tips: 1. The compass is good for project site without phone service area; 2. A few phone sensors are not accurate.)

7. Color Meter:

Directly purchase from us by $1.99 (Google Pay or PayPal to Daniel@Engineers-Builders.com). Or in Google Store

8. Structural Design Excel Apps for Android and iOS

Please contact Daniel T. Li, Engineering International Inc.

 

 

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